'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

function _defineProperty(obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value: value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }

  return obj;
}

function _classPrivateFieldGet(receiver, privateMap) {
  var descriptor = _classExtractFieldDescriptor(receiver, privateMap, "get");

  return _classApplyDescriptorGet(receiver, descriptor);
}

function _classPrivateFieldSet(receiver, privateMap, value) {
  var descriptor = _classExtractFieldDescriptor(receiver, privateMap, "set");

  _classApplyDescriptorSet(receiver, descriptor, value);

  return value;
}

function _classExtractFieldDescriptor(receiver, privateMap, action) {
  if (!privateMap.has(receiver)) {
    throw new TypeError("attempted to " + action + " private field on non-instance");
  }

  return privateMap.get(receiver);
}

function _classApplyDescriptorGet(receiver, descriptor) {
  if (descriptor.get) {
    return descriptor.get.call(receiver);
  }

  return descriptor.value;
}

function _classApplyDescriptorSet(receiver, descriptor, value) {
  if (descriptor.set) {
    descriptor.set.call(receiver, value);
  } else {
    if (!descriptor.writable) {
      throw new TypeError("attempted to set read only private field");
    }

    descriptor.value = value;
  }
}

function _classPrivateMethodGet(receiver, privateSet, fn) {
  if (!privateSet.has(receiver)) {
    throw new TypeError("attempted to get private field on non-instance");
  }

  return fn;
}

function _checkPrivateRedeclaration(obj, privateCollection) {
  if (privateCollection.has(obj)) {
    throw new TypeError("Cannot initialize the same private elements twice on an object");
  }
}

function _classPrivateFieldInitSpec(obj, privateMap, value) {
  _checkPrivateRedeclaration(obj, privateMap);

  privateMap.set(obj, value);
}

function _classPrivateMethodInitSpec(obj, privateSet) {
  _checkPrivateRedeclaration(obj, privateSet);

  privateSet.add(obj);
}

var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

var check = function (it) {
  return it && it.Math == Math && it;
};

// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
var global$b =
  // eslint-disable-next-line es/no-global-this -- safe
  check(typeof globalThis == 'object' && globalThis) ||
  check(typeof window == 'object' && window) ||
  // eslint-disable-next-line no-restricted-globals -- safe
  check(typeof self == 'object' && self) ||
  check(typeof commonjsGlobal == 'object' && commonjsGlobal) ||
  // eslint-disable-next-line no-new-func -- fallback
  (function () { return this; })() || Function('return this')();

var objectGetOwnPropertyDescriptor = {};

var fails$a = function (exec) {
  try {
    return !!exec();
  } catch (error) {
    return true;
  }
};

var fails$9 = fails$a;

// Detect IE8's incomplete defineProperty implementation
var descriptors = !fails$9(function () {
  // eslint-disable-next-line es/no-object-defineproperty -- required for testing
  return Object.defineProperty({}, 1, { get: function () { return 7; } })[1] != 7;
});

var fails$8 = fails$a;

var functionBindNative = !fails$8(function () {
  // eslint-disable-next-line es/no-function-prototype-bind -- safe
  var test = (function () { /* empty */ }).bind();
  // eslint-disable-next-line no-prototype-builtins -- safe
  return typeof test != 'function' || test.hasOwnProperty('prototype');
});

var NATIVE_BIND$2 = functionBindNative;

var call$5 = Function.prototype.call;

var functionCall = NATIVE_BIND$2 ? call$5.bind(call$5) : function () {
  return call$5.apply(call$5, arguments);
};

var objectPropertyIsEnumerable = {};

var $propertyIsEnumerable = {}.propertyIsEnumerable;
// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
var getOwnPropertyDescriptor$2 = Object.getOwnPropertyDescriptor;

// Nashorn ~ JDK8 bug
var NASHORN_BUG = getOwnPropertyDescriptor$2 && !$propertyIsEnumerable.call({ 1: 2 }, 1);

// `Object.prototype.propertyIsEnumerable` method implementation
// https://tc39.es/ecma262/#sec-object.prototype.propertyisenumerable
objectPropertyIsEnumerable.f = NASHORN_BUG ? function propertyIsEnumerable(V) {
  var descriptor = getOwnPropertyDescriptor$2(this, V);
  return !!descriptor && descriptor.enumerable;
} : $propertyIsEnumerable;

var createPropertyDescriptor$3 = function (bitmap, value) {
  return {
    enumerable: !(bitmap & 1),
    configurable: !(bitmap & 2),
    writable: !(bitmap & 4),
    value: value
  };
};

var NATIVE_BIND$1 = functionBindNative;

var FunctionPrototype$2 = Function.prototype;
var bind = FunctionPrototype$2.bind;
var call$4 = FunctionPrototype$2.call;
var uncurryThis$b = NATIVE_BIND$1 && bind.bind(call$4, call$4);

var functionUncurryThis = NATIVE_BIND$1 ? function (fn) {
  return fn && uncurryThis$b(fn);
} : function (fn) {
  return fn && function () {
    return call$4.apply(fn, arguments);
  };
};

var uncurryThis$a = functionUncurryThis;

var toString$3 = uncurryThis$a({}.toString);
var stringSlice = uncurryThis$a(''.slice);

var classofRaw$1 = function (it) {
  return stringSlice(toString$3(it), 8, -1);
};

var uncurryThis$9 = functionUncurryThis;
var fails$7 = fails$a;
var classof$3 = classofRaw$1;

var $Object$3 = Object;
var split = uncurryThis$9(''.split);

// fallback for non-array-like ES3 and non-enumerable old V8 strings
var indexedObject = fails$7(function () {
  // throws an error in rhino, see https://github.com/mozilla/rhino/issues/346
  // eslint-disable-next-line no-prototype-builtins -- safe
  return !$Object$3('z').propertyIsEnumerable(0);
}) ? function (it) {
  return classof$3(it) == 'String' ? split(it, '') : $Object$3(it);
} : $Object$3;

// we can't use just `it == null` since of `document.all` special case
// https://tc39.es/ecma262/#sec-IsHTMLDDA-internal-slot-aec
var isNullOrUndefined$2 = function (it) {
  return it === null || it === undefined;
};

var isNullOrUndefined$1 = isNullOrUndefined$2;

var $TypeError$9 = TypeError;

// `RequireObjectCoercible` abstract operation
// https://tc39.es/ecma262/#sec-requireobjectcoercible
var requireObjectCoercible$2 = function (it) {
  if (isNullOrUndefined$1(it)) throw $TypeError$9("Can't call method on " + it);
  return it;
};

// toObject with fallback for non-array-like ES3 strings
var IndexedObject = indexedObject;
var requireObjectCoercible$1 = requireObjectCoercible$2;

var toIndexedObject$3 = function (it) {
  return IndexedObject(requireObjectCoercible$1(it));
};

var documentAll$2 = typeof document == 'object' && document.all;

// https://tc39.es/ecma262/#sec-IsHTMLDDA-internal-slot
var IS_HTMLDDA = typeof documentAll$2 == 'undefined' && documentAll$2 !== undefined;

var documentAll_1 = {
  all: documentAll$2,
  IS_HTMLDDA: IS_HTMLDDA
};

var $documentAll$1 = documentAll_1;

var documentAll$1 = $documentAll$1.all;

// `IsCallable` abstract operation
// https://tc39.es/ecma262/#sec-iscallable
var isCallable$d = $documentAll$1.IS_HTMLDDA ? function (argument) {
  return typeof argument == 'function' || argument === documentAll$1;
} : function (argument) {
  return typeof argument == 'function';
};

var isCallable$c = isCallable$d;
var $documentAll = documentAll_1;

var documentAll = $documentAll.all;

var isObject$7 = $documentAll.IS_HTMLDDA ? function (it) {
  return typeof it == 'object' ? it !== null : isCallable$c(it) || it === documentAll;
} : function (it) {
  return typeof it == 'object' ? it !== null : isCallable$c(it);
};

var global$a = global$b;
var isCallable$b = isCallable$d;

var aFunction = function (argument) {
  return isCallable$b(argument) ? argument : undefined;
};

var getBuiltIn$4 = function (namespace, method) {
  return arguments.length < 2 ? aFunction(global$a[namespace]) : global$a[namespace] && global$a[namespace][method];
};

var uncurryThis$8 = functionUncurryThis;

var objectIsPrototypeOf = uncurryThis$8({}.isPrototypeOf);

var getBuiltIn$3 = getBuiltIn$4;

var engineUserAgent = getBuiltIn$3('navigator', 'userAgent') || '';

var global$9 = global$b;
var userAgent = engineUserAgent;

var process = global$9.process;
var Deno = global$9.Deno;
var versions = process && process.versions || Deno && Deno.version;
var v8 = versions && versions.v8;
var match, version;

if (v8) {
  match = v8.split('.');
  // in old Chrome, versions of V8 isn't V8 = Chrome / 10
  // but their correct versions are not interesting for us
  version = match[0] > 0 && match[0] < 4 ? 1 : +(match[0] + match[1]);
}

// BrowserFS NodeJS `process` polyfill incorrectly set `.v8` to `0.0`
// so check `userAgent` even if `.v8` exists, but 0
if (!version && userAgent) {
  match = userAgent.match(/Edge\/(\d+)/);
  if (!match || match[1] >= 74) {
    match = userAgent.match(/Chrome\/(\d+)/);
    if (match) version = +match[1];
  }
}

var engineV8Version = version;

/* eslint-disable es/no-symbol -- required for testing */

var V8_VERSION = engineV8Version;
var fails$6 = fails$a;

// eslint-disable-next-line es/no-object-getownpropertysymbols -- required for testing
var symbolConstructorDetection = !!Object.getOwnPropertySymbols && !fails$6(function () {
  var symbol = Symbol();
  // Chrome 38 Symbol has incorrect toString conversion
  // `get-own-property-symbols` polyfill symbols converted to object are not Symbol instances
  return !String(symbol) || !(Object(symbol) instanceof Symbol) ||
    // Chrome 38-40 symbols are not inherited from DOM collections prototypes to instances
    !Symbol.sham && V8_VERSION && V8_VERSION < 41;
});

/* eslint-disable es/no-symbol -- required for testing */

var NATIVE_SYMBOL$1 = symbolConstructorDetection;

var useSymbolAsUid = NATIVE_SYMBOL$1
  && !Symbol.sham
  && typeof Symbol.iterator == 'symbol';

var getBuiltIn$2 = getBuiltIn$4;
var isCallable$a = isCallable$d;
var isPrototypeOf$1 = objectIsPrototypeOf;
var USE_SYMBOL_AS_UID$1 = useSymbolAsUid;

var $Object$2 = Object;

var isSymbol$2 = USE_SYMBOL_AS_UID$1 ? function (it) {
  return typeof it == 'symbol';
} : function (it) {
  var $Symbol = getBuiltIn$2('Symbol');
  return isCallable$a($Symbol) && isPrototypeOf$1($Symbol.prototype, $Object$2(it));
};

var $String$3 = String;

var tryToString$2 = function (argument) {
  try {
    return $String$3(argument);
  } catch (error) {
    return 'Object';
  }
};

var isCallable$9 = isCallable$d;
var tryToString$1 = tryToString$2;

var $TypeError$8 = TypeError;

// `Assert: IsCallable(argument) is true`
var aCallable$1 = function (argument) {
  if (isCallable$9(argument)) return argument;
  throw $TypeError$8(tryToString$1(argument) + ' is not a function');
};

var aCallable = aCallable$1;
var isNullOrUndefined = isNullOrUndefined$2;

// `GetMethod` abstract operation
// https://tc39.es/ecma262/#sec-getmethod
var getMethod$1 = function (V, P) {
  var func = V[P];
  return isNullOrUndefined(func) ? undefined : aCallable(func);
};

var call$3 = functionCall;
var isCallable$8 = isCallable$d;
var isObject$6 = isObject$7;

var $TypeError$7 = TypeError;

// `OrdinaryToPrimitive` abstract operation
// https://tc39.es/ecma262/#sec-ordinarytoprimitive
var ordinaryToPrimitive$1 = function (input, pref) {
  var fn, val;
  if (pref === 'string' && isCallable$8(fn = input.toString) && !isObject$6(val = call$3(fn, input))) return val;
  if (isCallable$8(fn = input.valueOf) && !isObject$6(val = call$3(fn, input))) return val;
  if (pref !== 'string' && isCallable$8(fn = input.toString) && !isObject$6(val = call$3(fn, input))) return val;
  throw $TypeError$7("Can't convert object to primitive value");
};

var shared$3 = {exports: {}};

var global$8 = global$b;

// eslint-disable-next-line es/no-object-defineproperty -- safe
var defineProperty$2 = Object.defineProperty;

var defineGlobalProperty$3 = function (key, value) {
  try {
    defineProperty$2(global$8, key, { value: value, configurable: true, writable: true });
  } catch (error) {
    global$8[key] = value;
  } return value;
};

var global$7 = global$b;
var defineGlobalProperty$2 = defineGlobalProperty$3;

var SHARED = '__core-js_shared__';
var store$3 = global$7[SHARED] || defineGlobalProperty$2(SHARED, {});

var sharedStore = store$3;

var store$2 = sharedStore;

(shared$3.exports = function (key, value) {
  return store$2[key] || (store$2[key] = value !== undefined ? value : {});
})('versions', []).push({
  version: '3.25.3',
  mode: 'global',
  copyright: '© 2014-2022 Denis Pushkarev (zloirock.ru)',
  license: 'https://github.com/zloirock/core-js/blob/v3.25.3/LICENSE',
  source: 'https://github.com/zloirock/core-js'
});

var requireObjectCoercible = requireObjectCoercible$2;

var $Object$1 = Object;

// `ToObject` abstract operation
// https://tc39.es/ecma262/#sec-toobject
var toObject$3 = function (argument) {
  return $Object$1(requireObjectCoercible(argument));
};

var uncurryThis$7 = functionUncurryThis;
var toObject$2 = toObject$3;

var hasOwnProperty = uncurryThis$7({}.hasOwnProperty);

// `HasOwnProperty` abstract operation
// https://tc39.es/ecma262/#sec-hasownproperty
// eslint-disable-next-line es/no-object-hasown -- safe
var hasOwnProperty_1 = Object.hasOwn || function hasOwn(it, key) {
  return hasOwnProperty(toObject$2(it), key);
};

var uncurryThis$6 = functionUncurryThis;

var id = 0;
var postfix = Math.random();
var toString$2 = uncurryThis$6(1.0.toString);

var uid$2 = function (key) {
  return 'Symbol(' + (key === undefined ? '' : key) + ')_' + toString$2(++id + postfix, 36);
};

var global$6 = global$b;
var shared$2 = shared$3.exports;
var hasOwn$7 = hasOwnProperty_1;
var uid$1 = uid$2;
var NATIVE_SYMBOL = symbolConstructorDetection;
var USE_SYMBOL_AS_UID = useSymbolAsUid;

var WellKnownSymbolsStore = shared$2('wks');
var Symbol$1 = global$6.Symbol;
var symbolFor = Symbol$1 && Symbol$1['for'];
var createWellKnownSymbol = USE_SYMBOL_AS_UID ? Symbol$1 : Symbol$1 && Symbol$1.withoutSetter || uid$1;

var wellKnownSymbol$3 = function (name) {
  if (!hasOwn$7(WellKnownSymbolsStore, name) || !(NATIVE_SYMBOL || typeof WellKnownSymbolsStore[name] == 'string')) {
    var description = 'Symbol.' + name;
    if (NATIVE_SYMBOL && hasOwn$7(Symbol$1, name)) {
      WellKnownSymbolsStore[name] = Symbol$1[name];
    } else if (USE_SYMBOL_AS_UID && symbolFor) {
      WellKnownSymbolsStore[name] = symbolFor(description);
    } else {
      WellKnownSymbolsStore[name] = createWellKnownSymbol(description);
    }
  } return WellKnownSymbolsStore[name];
};

var call$2 = functionCall;
var isObject$5 = isObject$7;
var isSymbol$1 = isSymbol$2;
var getMethod = getMethod$1;
var ordinaryToPrimitive = ordinaryToPrimitive$1;
var wellKnownSymbol$2 = wellKnownSymbol$3;

var $TypeError$6 = TypeError;
var TO_PRIMITIVE = wellKnownSymbol$2('toPrimitive');

// `ToPrimitive` abstract operation
// https://tc39.es/ecma262/#sec-toprimitive
var toPrimitive$1 = function (input, pref) {
  if (!isObject$5(input) || isSymbol$1(input)) return input;
  var exoticToPrim = getMethod(input, TO_PRIMITIVE);
  var result;
  if (exoticToPrim) {
    if (pref === undefined) pref = 'default';
    result = call$2(exoticToPrim, input, pref);
    if (!isObject$5(result) || isSymbol$1(result)) return result;
    throw $TypeError$6("Can't convert object to primitive value");
  }
  if (pref === undefined) pref = 'number';
  return ordinaryToPrimitive(input, pref);
};

var toPrimitive = toPrimitive$1;
var isSymbol = isSymbol$2;

// `ToPropertyKey` abstract operation
// https://tc39.es/ecma262/#sec-topropertykey
var toPropertyKey$2 = function (argument) {
  var key = toPrimitive(argument, 'string');
  return isSymbol(key) ? key : key + '';
};

var global$5 = global$b;
var isObject$4 = isObject$7;

var document$1 = global$5.document;
// typeof document.createElement is 'object' in old IE
var EXISTS$1 = isObject$4(document$1) && isObject$4(document$1.createElement);

var documentCreateElement = function (it) {
  return EXISTS$1 ? document$1.createElement(it) : {};
};

var DESCRIPTORS$8 = descriptors;
var fails$5 = fails$a;
var createElement = documentCreateElement;

// Thanks to IE8 for its funny defineProperty
var ie8DomDefine = !DESCRIPTORS$8 && !fails$5(function () {
  // eslint-disable-next-line es/no-object-defineproperty -- required for testing
  return Object.defineProperty(createElement('div'), 'a', {
    get: function () { return 7; }
  }).a != 7;
});

var DESCRIPTORS$7 = descriptors;
var call$1 = functionCall;
var propertyIsEnumerableModule = objectPropertyIsEnumerable;
var createPropertyDescriptor$2 = createPropertyDescriptor$3;
var toIndexedObject$2 = toIndexedObject$3;
var toPropertyKey$1 = toPropertyKey$2;
var hasOwn$6 = hasOwnProperty_1;
var IE8_DOM_DEFINE$1 = ie8DomDefine;

// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
var $getOwnPropertyDescriptor$1 = Object.getOwnPropertyDescriptor;

// `Object.getOwnPropertyDescriptor` method
// https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
objectGetOwnPropertyDescriptor.f = DESCRIPTORS$7 ? $getOwnPropertyDescriptor$1 : function getOwnPropertyDescriptor(O, P) {
  O = toIndexedObject$2(O);
  P = toPropertyKey$1(P);
  if (IE8_DOM_DEFINE$1) try {
    return $getOwnPropertyDescriptor$1(O, P);
  } catch (error) { /* empty */ }
  if (hasOwn$6(O, P)) return createPropertyDescriptor$2(!call$1(propertyIsEnumerableModule.f, O, P), O[P]);
};

var objectDefineProperty = {};

var DESCRIPTORS$6 = descriptors;
var fails$4 = fails$a;

// V8 ~ Chrome 36-
// https://bugs.chromium.org/p/v8/issues/detail?id=3334
var v8PrototypeDefineBug = DESCRIPTORS$6 && fails$4(function () {
  // eslint-disable-next-line es/no-object-defineproperty -- required for testing
  return Object.defineProperty(function () { /* empty */ }, 'prototype', {
    value: 42,
    writable: false
  }).prototype != 42;
});

var isObject$3 = isObject$7;

var $String$2 = String;
var $TypeError$5 = TypeError;

// `Assert: Type(argument) is Object`
var anObject$3 = function (argument) {
  if (isObject$3(argument)) return argument;
  throw $TypeError$5($String$2(argument) + ' is not an object');
};

var DESCRIPTORS$5 = descriptors;
var IE8_DOM_DEFINE = ie8DomDefine;
var V8_PROTOTYPE_DEFINE_BUG = v8PrototypeDefineBug;
var anObject$2 = anObject$3;
var toPropertyKey = toPropertyKey$2;

var $TypeError$4 = TypeError;
// eslint-disable-next-line es/no-object-defineproperty -- safe
var $defineProperty = Object.defineProperty;
// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
var $getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
var ENUMERABLE = 'enumerable';
var CONFIGURABLE$1 = 'configurable';
var WRITABLE = 'writable';

// `Object.defineProperty` method
// https://tc39.es/ecma262/#sec-object.defineproperty
objectDefineProperty.f = DESCRIPTORS$5 ? V8_PROTOTYPE_DEFINE_BUG ? function defineProperty(O, P, Attributes) {
  anObject$2(O);
  P = toPropertyKey(P);
  anObject$2(Attributes);
  if (typeof O === 'function' && P === 'prototype' && 'value' in Attributes && WRITABLE in Attributes && !Attributes[WRITABLE]) {
    var current = $getOwnPropertyDescriptor(O, P);
    if (current && current[WRITABLE]) {
      O[P] = Attributes.value;
      Attributes = {
        configurable: CONFIGURABLE$1 in Attributes ? Attributes[CONFIGURABLE$1] : current[CONFIGURABLE$1],
        enumerable: ENUMERABLE in Attributes ? Attributes[ENUMERABLE] : current[ENUMERABLE],
        writable: false
      };
    }
  } return $defineProperty(O, P, Attributes);
} : $defineProperty : function defineProperty(O, P, Attributes) {
  anObject$2(O);
  P = toPropertyKey(P);
  anObject$2(Attributes);
  if (IE8_DOM_DEFINE) try {
    return $defineProperty(O, P, Attributes);
  } catch (error) { /* empty */ }
  if ('get' in Attributes || 'set' in Attributes) throw $TypeError$4('Accessors not supported');
  if ('value' in Attributes) O[P] = Attributes.value;
  return O;
};

var DESCRIPTORS$4 = descriptors;
var definePropertyModule$2 = objectDefineProperty;
var createPropertyDescriptor$1 = createPropertyDescriptor$3;

var createNonEnumerableProperty$4 = DESCRIPTORS$4 ? function (object, key, value) {
  return definePropertyModule$2.f(object, key, createPropertyDescriptor$1(1, value));
} : function (object, key, value) {
  object[key] = value;
  return object;
};

var makeBuiltIn$2 = {exports: {}};

var DESCRIPTORS$3 = descriptors;
var hasOwn$5 = hasOwnProperty_1;

var FunctionPrototype$1 = Function.prototype;
// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
var getDescriptor = DESCRIPTORS$3 && Object.getOwnPropertyDescriptor;

var EXISTS = hasOwn$5(FunctionPrototype$1, 'name');
// additional protection from minified / mangled / dropped function names
var PROPER = EXISTS && (function something() { /* empty */ }).name === 'something';
var CONFIGURABLE = EXISTS && (!DESCRIPTORS$3 || (DESCRIPTORS$3 && getDescriptor(FunctionPrototype$1, 'name').configurable));

var functionName = {
  EXISTS: EXISTS,
  PROPER: PROPER,
  CONFIGURABLE: CONFIGURABLE
};

var uncurryThis$5 = functionUncurryThis;
var isCallable$7 = isCallable$d;
var store$1 = sharedStore;

var functionToString = uncurryThis$5(Function.toString);

// this helper broken in `core-js@3.4.1-3.4.4`, so we can't use `shared` helper
if (!isCallable$7(store$1.inspectSource)) {
  store$1.inspectSource = function (it) {
    return functionToString(it);
  };
}

var inspectSource$1 = store$1.inspectSource;

var global$4 = global$b;
var isCallable$6 = isCallable$d;

var WeakMap$2 = global$4.WeakMap;

var weakMapBasicDetection = isCallable$6(WeakMap$2) && /native code/.test(String(WeakMap$2));

var shared$1 = shared$3.exports;
var uid = uid$2;

var keys = shared$1('keys');

var sharedKey$1 = function (key) {
  return keys[key] || (keys[key] = uid(key));
};

var hiddenKeys$3 = {};

var NATIVE_WEAK_MAP = weakMapBasicDetection;
var global$3 = global$b;
var uncurryThis$4 = functionUncurryThis;
var isObject$2 = isObject$7;
var createNonEnumerableProperty$3 = createNonEnumerableProperty$4;
var hasOwn$4 = hasOwnProperty_1;
var shared = sharedStore;
var sharedKey = sharedKey$1;
var hiddenKeys$2 = hiddenKeys$3;

var OBJECT_ALREADY_INITIALIZED = 'Object already initialized';
var TypeError$1 = global$3.TypeError;
var WeakMap$1 = global$3.WeakMap;
var set$2, get$1, has;

var enforce = function (it) {
  return has(it) ? get$1(it) : set$2(it, {});
};

var getterFor = function (TYPE) {
  return function (it) {
    var state;
    if (!isObject$2(it) || (state = get$1(it)).type !== TYPE) {
      throw TypeError$1('Incompatible receiver, ' + TYPE + ' required');
    } return state;
  };
};

if (NATIVE_WEAK_MAP || shared.state) {
  var store = shared.state || (shared.state = new WeakMap$1());
  var wmget = uncurryThis$4(store.get);
  var wmhas = uncurryThis$4(store.has);
  var wmset = uncurryThis$4(store.set);
  set$2 = function (it, metadata) {
    if (wmhas(store, it)) throw TypeError$1(OBJECT_ALREADY_INITIALIZED);
    metadata.facade = it;
    wmset(store, it, metadata);
    return metadata;
  };
  get$1 = function (it) {
    return wmget(store, it) || {};
  };
  has = function (it) {
    return wmhas(store, it);
  };
} else {
  var STATE = sharedKey('state');
  hiddenKeys$2[STATE] = true;
  set$2 = function (it, metadata) {
    if (hasOwn$4(it, STATE)) throw TypeError$1(OBJECT_ALREADY_INITIALIZED);
    metadata.facade = it;
    createNonEnumerableProperty$3(it, STATE, metadata);
    return metadata;
  };
  get$1 = function (it) {
    return hasOwn$4(it, STATE) ? it[STATE] : {};
  };
  has = function (it) {
    return hasOwn$4(it, STATE);
  };
}

var internalState = {
  set: set$2,
  get: get$1,
  has: has,
  enforce: enforce,
  getterFor: getterFor
};

var fails$3 = fails$a;
var isCallable$5 = isCallable$d;
var hasOwn$3 = hasOwnProperty_1;
var DESCRIPTORS$2 = descriptors;
var CONFIGURABLE_FUNCTION_NAME = functionName.CONFIGURABLE;
var inspectSource = inspectSource$1;
var InternalStateModule = internalState;

var enforceInternalState = InternalStateModule.enforce;
var getInternalState = InternalStateModule.get;
// eslint-disable-next-line es/no-object-defineproperty -- safe
var defineProperty$1 = Object.defineProperty;

var CONFIGURABLE_LENGTH = DESCRIPTORS$2 && !fails$3(function () {
  return defineProperty$1(function () { /* empty */ }, 'length', { value: 8 }).length !== 8;
});

var TEMPLATE = String(String).split('String');

var makeBuiltIn$1 = makeBuiltIn$2.exports = function (value, name, options) {
  if (String(name).slice(0, 7) === 'Symbol(') {
    name = '[' + String(name).replace(/^Symbol\(([^)]*)\)/, '$1') + ']';
  }
  if (options && options.getter) name = 'get ' + name;
  if (options && options.setter) name = 'set ' + name;
  if (!hasOwn$3(value, 'name') || (CONFIGURABLE_FUNCTION_NAME && value.name !== name)) {
    if (DESCRIPTORS$2) defineProperty$1(value, 'name', { value: name, configurable: true });
    else value.name = name;
  }
  if (CONFIGURABLE_LENGTH && options && hasOwn$3(options, 'arity') && value.length !== options.arity) {
    defineProperty$1(value, 'length', { value: options.arity });
  }
  try {
    if (options && hasOwn$3(options, 'constructor') && options.constructor) {
      if (DESCRIPTORS$2) defineProperty$1(value, 'prototype', { writable: false });
    // in V8 ~ Chrome 53, prototypes of some methods, like `Array.prototype.values`, are non-writable
    } else if (value.prototype) value.prototype = undefined;
  } catch (error) { /* empty */ }
  var state = enforceInternalState(value);
  if (!hasOwn$3(state, 'source')) {
    state.source = TEMPLATE.join(typeof name == 'string' ? name : '');
  } return value;
};

// add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative
// eslint-disable-next-line no-extend-native -- required
Function.prototype.toString = makeBuiltIn$1(function toString() {
  return isCallable$5(this) && getInternalState(this).source || inspectSource(this);
}, 'toString');

var isCallable$4 = isCallable$d;
var definePropertyModule$1 = objectDefineProperty;
var makeBuiltIn = makeBuiltIn$2.exports;
var defineGlobalProperty$1 = defineGlobalProperty$3;

var defineBuiltIn$1 = function (O, key, value, options) {
  if (!options) options = {};
  var simple = options.enumerable;
  var name = options.name !== undefined ? options.name : key;
  if (isCallable$4(value)) makeBuiltIn(value, name, options);
  if (options.global) {
    if (simple) O[key] = value;
    else defineGlobalProperty$1(key, value);
  } else {
    try {
      if (!options.unsafe) delete O[key];
      else if (O[key]) simple = true;
    } catch (error) { /* empty */ }
    if (simple) O[key] = value;
    else definePropertyModule$1.f(O, key, {
      value: value,
      enumerable: false,
      configurable: !options.nonConfigurable,
      writable: !options.nonWritable
    });
  } return O;
};

var objectGetOwnPropertyNames = {};

var ceil = Math.ceil;
var floor = Math.floor;

// `Math.trunc` method
// https://tc39.es/ecma262/#sec-math.trunc
// eslint-disable-next-line es/no-math-trunc -- safe
var mathTrunc = Math.trunc || function trunc(x) {
  var n = +x;
  return (n > 0 ? floor : ceil)(n);
};

var trunc = mathTrunc;

// `ToIntegerOrInfinity` abstract operation
// https://tc39.es/ecma262/#sec-tointegerorinfinity
var toIntegerOrInfinity$2 = function (argument) {
  var number = +argument;
  // eslint-disable-next-line no-self-compare -- NaN check
  return number !== number || number === 0 ? 0 : trunc(number);
};

var toIntegerOrInfinity$1 = toIntegerOrInfinity$2;

var max$1 = Math.max;
var min$1 = Math.min;

// Helper for a popular repeating case of the spec:
// Let integer be ? ToInteger(index).
// If integer < 0, let result be max((length + integer), 0); else let result be min(integer, length).
var toAbsoluteIndex$1 = function (index, length) {
  var integer = toIntegerOrInfinity$1(index);
  return integer < 0 ? max$1(integer + length, 0) : min$1(integer, length);
};

var toIntegerOrInfinity = toIntegerOrInfinity$2;

var min = Math.min;

// `ToLength` abstract operation
// https://tc39.es/ecma262/#sec-tolength
var toLength$1 = function (argument) {
  return argument > 0 ? min(toIntegerOrInfinity(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991
};

var toLength = toLength$1;

// `LengthOfArrayLike` abstract operation
// https://tc39.es/ecma262/#sec-lengthofarraylike
var lengthOfArrayLike$3 = function (obj) {
  return toLength(obj.length);
};

var toIndexedObject$1 = toIndexedObject$3;
var toAbsoluteIndex = toAbsoluteIndex$1;
var lengthOfArrayLike$2 = lengthOfArrayLike$3;

// `Array.prototype.{ indexOf, includes }` methods implementation
var createMethod = function (IS_INCLUDES) {
  return function ($this, el, fromIndex) {
    var O = toIndexedObject$1($this);
    var length = lengthOfArrayLike$2(O);
    var index = toAbsoluteIndex(fromIndex, length);
    var value;
    // Array#includes uses SameValueZero equality algorithm
    // eslint-disable-next-line no-self-compare -- NaN check
    if (IS_INCLUDES && el != el) while (length > index) {
      value = O[index++];
      // eslint-disable-next-line no-self-compare -- NaN check
      if (value != value) return true;
    // Array#indexOf ignores holes, Array#includes - not
    } else for (;length > index; index++) {
      if ((IS_INCLUDES || index in O) && O[index] === el) return IS_INCLUDES || index || 0;
    } return !IS_INCLUDES && -1;
  };
};

var arrayIncludes = {
  // `Array.prototype.includes` method
  // https://tc39.es/ecma262/#sec-array.prototype.includes
  includes: createMethod(true),
  // `Array.prototype.indexOf` method
  // https://tc39.es/ecma262/#sec-array.prototype.indexof
  indexOf: createMethod(false)
};

var uncurryThis$3 = functionUncurryThis;
var hasOwn$2 = hasOwnProperty_1;
var toIndexedObject = toIndexedObject$3;
var indexOf = arrayIncludes.indexOf;
var hiddenKeys$1 = hiddenKeys$3;

var push = uncurryThis$3([].push);

var objectKeysInternal = function (object, names) {
  var O = toIndexedObject(object);
  var i = 0;
  var result = [];
  var key;
  for (key in O) !hasOwn$2(hiddenKeys$1, key) && hasOwn$2(O, key) && push(result, key);
  // Don't enum bug & hidden keys
  while (names.length > i) if (hasOwn$2(O, key = names[i++])) {
    ~indexOf(result, key) || push(result, key);
  }
  return result;
};

// IE8- don't enum bug keys
var enumBugKeys$1 = [
  'constructor',
  'hasOwnProperty',
  'isPrototypeOf',
  'propertyIsEnumerable',
  'toLocaleString',
  'toString',
  'valueOf'
];

var internalObjectKeys = objectKeysInternal;
var enumBugKeys = enumBugKeys$1;

var hiddenKeys = enumBugKeys.concat('length', 'prototype');

// `Object.getOwnPropertyNames` method
// https://tc39.es/ecma262/#sec-object.getownpropertynames
// eslint-disable-next-line es/no-object-getownpropertynames -- safe
objectGetOwnPropertyNames.f = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {
  return internalObjectKeys(O, hiddenKeys);
};

var objectGetOwnPropertySymbols = {};

// eslint-disable-next-line es/no-object-getownpropertysymbols -- safe
objectGetOwnPropertySymbols.f = Object.getOwnPropertySymbols;

var getBuiltIn$1 = getBuiltIn$4;
var uncurryThis$2 = functionUncurryThis;
var getOwnPropertyNamesModule = objectGetOwnPropertyNames;
var getOwnPropertySymbolsModule = objectGetOwnPropertySymbols;
var anObject$1 = anObject$3;

var concat = uncurryThis$2([].concat);

// all object keys, includes non-enumerable and symbols
var ownKeys$1 = getBuiltIn$1('Reflect', 'ownKeys') || function ownKeys(it) {
  var keys = getOwnPropertyNamesModule.f(anObject$1(it));
  var getOwnPropertySymbols = getOwnPropertySymbolsModule.f;
  return getOwnPropertySymbols ? concat(keys, getOwnPropertySymbols(it)) : keys;
};

var hasOwn$1 = hasOwnProperty_1;
var ownKeys = ownKeys$1;
var getOwnPropertyDescriptorModule = objectGetOwnPropertyDescriptor;
var definePropertyModule = objectDefineProperty;

var copyConstructorProperties$2 = function (target, source, exceptions) {
  var keys = ownKeys(source);
  var defineProperty = definePropertyModule.f;
  var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;
  for (var i = 0; i < keys.length; i++) {
    var key = keys[i];
    if (!hasOwn$1(target, key) && !(exceptions && hasOwn$1(exceptions, key))) {
      defineProperty(target, key, getOwnPropertyDescriptor(source, key));
    }
  }
};

var fails$2 = fails$a;
var isCallable$3 = isCallable$d;

var replacement = /#|\.prototype\./;

var isForced$1 = function (feature, detection) {
  var value = data[normalize(feature)];
  return value == POLYFILL ? true
    : value == NATIVE ? false
    : isCallable$3(detection) ? fails$2(detection)
    : !!detection;
};

var normalize = isForced$1.normalize = function (string) {
  return String(string).replace(replacement, '.').toLowerCase();
};

var data = isForced$1.data = {};
var NATIVE = isForced$1.NATIVE = 'N';
var POLYFILL = isForced$1.POLYFILL = 'P';

var isForced_1 = isForced$1;

var global$2 = global$b;
var getOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
var createNonEnumerableProperty$2 = createNonEnumerableProperty$4;
var defineBuiltIn = defineBuiltIn$1;
var defineGlobalProperty = defineGlobalProperty$3;
var copyConstructorProperties$1 = copyConstructorProperties$2;
var isForced = isForced_1;

/*
  options.target         - name of the target object
  options.global         - target is the global object
  options.stat           - export as static methods of target
  options.proto          - export as prototype methods of target
  options.real           - real prototype method for the `pure` version
  options.forced         - export even if the native feature is available
  options.bind           - bind methods to the target, required for the `pure` version
  options.wrap           - wrap constructors to preventing global pollution, required for the `pure` version
  options.unsafe         - use the simple assignment of property instead of delete + defineProperty
  options.sham           - add a flag to not completely full polyfills
  options.enumerable     - export as enumerable property
  options.dontCallGetSet - prevent calling a getter on target
  options.name           - the .name of the function if it does not match the key
*/
var _export = function (options, source) {
  var TARGET = options.target;
  var GLOBAL = options.global;
  var STATIC = options.stat;
  var FORCED, target, key, targetProperty, sourceProperty, descriptor;
  if (GLOBAL) {
    target = global$2;
  } else if (STATIC) {
    target = global$2[TARGET] || defineGlobalProperty(TARGET, {});
  } else {
    target = (global$2[TARGET] || {}).prototype;
  }
  if (target) for (key in source) {
    sourceProperty = source[key];
    if (options.dontCallGetSet) {
      descriptor = getOwnPropertyDescriptor$1(target, key);
      targetProperty = descriptor && descriptor.value;
    } else targetProperty = target[key];
    FORCED = isForced(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);
    // contained in target
    if (!FORCED && targetProperty !== undefined) {
      if (typeof sourceProperty == typeof targetProperty) continue;
      copyConstructorProperties$1(sourceProperty, targetProperty);
    }
    // add a flag to not completely full polyfills
    if (options.sham || (targetProperty && targetProperty.sham)) {
      createNonEnumerableProperty$2(sourceProperty, 'sham', true);
    }
    defineBuiltIn(target, key, sourceProperty, options);
  }
};

var classof$2 = classofRaw$1;

// `IsArray` abstract operation
// https://tc39.es/ecma262/#sec-isarray
// eslint-disable-next-line es/no-array-isarray -- safe
var isArray$1 = Array.isArray || function isArray(argument) {
  return classof$2(argument) == 'Array';
};

var DESCRIPTORS$1 = descriptors;
var isArray = isArray$1;

var $TypeError$3 = TypeError;
// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
var getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;

// Safari < 13 does not throw an error in this case
var SILENT_ON_NON_WRITABLE_LENGTH_SET = DESCRIPTORS$1 && !function () {
  // makes no sense without proper strict mode support
  if (this !== undefined) return true;
  try {
    // eslint-disable-next-line es/no-object-defineproperty -- safe
    Object.defineProperty([], 'length', { writable: false }).length = 1;
  } catch (error) {
    return error instanceof TypeError;
  }
}();

var arraySetLength = SILENT_ON_NON_WRITABLE_LENGTH_SET ? function (O, length) {
  if (isArray(O) && !getOwnPropertyDescriptor(O, 'length').writable) {
    throw $TypeError$3('Cannot set read only .length');
  } return O.length = length;
} : function (O, length) {
  return O.length = length;
};

var $TypeError$2 = TypeError;
var MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF; // 2 ** 53 - 1 == 9007199254740991

var doesNotExceedSafeInteger$2 = function (it) {
  if (it > MAX_SAFE_INTEGER) throw $TypeError$2('Maximum allowed index exceeded');
  return it;
};

var $$2 = _export;
var toObject$1 = toObject$3;
var lengthOfArrayLike$1 = lengthOfArrayLike$3;
var setArrayLength$1 = arraySetLength;
var doesNotExceedSafeInteger$1 = doesNotExceedSafeInteger$2;
var fails$1 = fails$a;

var INCORRECT_TO_LENGTH = fails$1(function () {
  return [].push.call({ length: 0x100000000 }, 1) !== 4294967297;
});

// V8 and Safari <= 15.4, FF < 23 throws InternalError
// https://bugs.chromium.org/p/v8/issues/detail?id=12681
var SILENT_ON_NON_WRITABLE_LENGTH$1 = !function () {
  try {
    // eslint-disable-next-line es/no-object-defineproperty -- safe
    Object.defineProperty([], 'length', { writable: false }).push();
  } catch (error) {
    return error instanceof TypeError;
  }
}();

// `Array.prototype.push` method
// https://tc39.es/ecma262/#sec-array.prototype.push
$$2({ target: 'Array', proto: true, arity: 1, forced: INCORRECT_TO_LENGTH || SILENT_ON_NON_WRITABLE_LENGTH$1 }, {
  // eslint-disable-next-line no-unused-vars -- required for `.length`
  push: function push(item) {
    var O = toObject$1(this);
    var len = lengthOfArrayLike$1(O);
    var argCount = arguments.length;
    doesNotExceedSafeInteger$1(len + argCount);
    for (var i = 0; i < argCount; i++) {
      O[len] = arguments[i];
      len++;
    }
    setArrayLength$1(O, len);
    return len;
  }
});

// A is m x n. B is n x p. product is m x p.
function multiplyMatrices(A, B) {
  let m = A.length;

  if (!Array.isArray(A[0])) {
    // A is vector, convert to [[a, b, c, ...]]
    A = [A];
  }

  if (!Array.isArray(B[0])) {
    // B is vector, convert to [[a], [b], [c], ...]]
    B = B.map(x => [x]);
  }

  let p = B[0].length;
  let B_cols = B[0].map((_, i) => B.map(x => x[i])); // transpose B

  let product = A.map(row => B_cols.map(col => {
    let ret = 0;

    if (!Array.isArray(row)) {
      for (let c of col) {
        ret += row * c;
      }

      return ret;
    }

    for (let i = 0; i < row.length; i++) {
      ret += row[i] * (col[i] || 0);
    }

    return ret;
  }));

  if (m === 1) {
    product = product[0]; // Avoid [[a, b, c, ...]]
  }

  if (p === 1) {
    return product.map(x => x[0]); // Avoid [[a], [b], [c], ...]]
  }

  return product;
}

/**
 * Check if a value is a string (including a String object)
 * @param {*} str - Value to check
 * @returns {boolean}
 */

function isString(str) {
  return type(str) === "string";
}
/**
 * Determine the internal JavaScript [[Class]] of an object.
 * @param {*} o - Value to check
 * @returns {string}
 */

function type(o) {
  let str = Object.prototype.toString.call(o);
  return (str.match(/^\[object\s+(.*?)\]$/)[1] || "").toLowerCase();
}
/**
 * Round a number to a certain number of significant digits
 * @param {number} n - The number to round
 * @param {number} precision - Number of significant digits
 */

function toPrecision(n, precision) {
  n = +n;
  precision = +precision;
  let integerLength = (Math.floor(n) + "").length;

  if (precision > integerLength) {
    return +n.toFixed(precision - integerLength);
  } else {
    let p10 = 10 ** (integerLength - precision);
    return Math.round(n / p10) * p10;
  }
}
/**
* Parse a CSS function, regardless of its name and arguments
* @param String str String to parse
* @return {{name, args, rawArgs}}
*/

function parseFunction(str) {
  if (!str) {
    return;
  }

  str = str.trim();
  const isFunctionRegex = /^([a-z]+)\((.+?)\)$/i;
  const isNumberRegex = /^-?[\d.]+$/;
  let parts = str.match(isFunctionRegex);

  if (parts) {
    // It is a function, parse args
    let args = [];
    parts[2].replace(/\/?\s*([-\w.]+(?:%|deg)?)/g, ($0, arg) => {
      if (/%$/.test(arg)) {
        // Convert percentages to 0-1 numbers
        arg = new Number(arg.slice(0, -1) / 100);
        arg.type = "<percentage>";
      } else if (/deg$/.test(arg)) {
        // Drop deg from degrees and convert to number
        // TODO handle other units too
        arg = new Number(+arg.slice(0, -3));
        arg.type = "<angle>";
        arg.unit = "deg";
      } else if (isNumberRegex.test(arg)) {
        // Convert numerical args to numbers
        arg = new Number(arg);
        arg.type = "<number>";
      }

      if ($0.startsWith("/")) {
        // It's alpha
        arg = arg instanceof Number ? arg : new Number(arg);
        arg.alpha = true;
      }

      args.push(arg);
    });
    return {
      name: parts[1].toLowerCase(),
      rawName: parts[1],
      rawArgs: parts[2],
      // An argument could be (as of css-color-4):
      // a number, percentage, degrees (hue), ident (in color())
      args
    };
  }
}
function last(arr) {
  return arr[arr.length - 1];
}
function interpolate(start, end, p) {
  if (isNaN(start)) {
    return end;
  }

  if (isNaN(end)) {
    return start;
  }

  return start + (end - start) * p;
}
function interpolateInv(start, end, value) {
  return (value - start) / (end - start);
}
function mapRange(from, to, value) {
  return interpolate(to[0], to[1], interpolateInv(from[0], from[1], value));
}
function parseCoordGrammar(coordGrammars) {
  return coordGrammars.map(coordGrammar => {
    return coordGrammar.split("|").map(type => {
      type = type.trim();
      let range = type.match(/^(<[a-z]+>)\[(-?[.\d]+),\s*(-?[.\d]+)\]?$/);

      if (range) {
        let ret = new String(range[1]);
        ret.range = [+range[2], +range[3]];
        return ret;
      }

      return type;
    });
  });
}

var util = /*#__PURE__*/Object.freeze({
  __proto__: null,
  isString: isString,
  type: type,
  toPrecision: toPrecision,
  parseFunction: parseFunction,
  last: last,
  interpolate: interpolate,
  interpolateInv: interpolateInv,
  mapRange: mapRange,
  parseCoordGrammar: parseCoordGrammar,
  multiplyMatrices: multiplyMatrices
});

/**
 * A class for adding deep extensibility to any piece of JS code
 */
class Hooks {
  add(name, callback, first) {
    if (typeof arguments[0] != "string") {
      // Multiple hooks
      for (var name in arguments[0]) {
        this.add(name, arguments[0][name], arguments[1]);
      }

      return;
    }

    (Array.isArray(name) ? name : [name]).forEach(function (name) {
      this[name] = this[name] || [];

      if (callback) {
        this[name][first ? "unshift" : "push"](callback);
      }
    }, this);
  }

  run(name, env) {
    this[name] = this[name] || [];
    this[name].forEach(function (callback) {
      callback.call(env && env.context ? env.context : env, env);
    });
  }

}
/**
 * The instance of {@link Hooks} used throughout Color.js
 */

const hooks = new Hooks();
var hooks$1 = hooks;

// Global defaults one may want to configure
var defaults = {
  gamut_mapping: "lch.c",
  precision: 5,
  deltaE: "76" // Default deltaE method

};

var NATIVE_BIND = functionBindNative;

var FunctionPrototype = Function.prototype;
var apply$1 = FunctionPrototype.apply;
var call = FunctionPrototype.call;

// eslint-disable-next-line es/no-reflect -- safe
var functionApply = typeof Reflect == 'object' && Reflect.apply || (NATIVE_BIND ? call.bind(apply$1) : function () {
  return call.apply(apply$1, arguments);
});

var isCallable$2 = isCallable$d;

var $String$1 = String;
var $TypeError$1 = TypeError;

var aPossiblePrototype$1 = function (argument) {
  if (typeof argument == 'object' || isCallable$2(argument)) return argument;
  throw $TypeError$1("Can't set " + $String$1(argument) + ' as a prototype');
};

/* eslint-disable no-proto -- safe */

var uncurryThis$1 = functionUncurryThis;
var anObject = anObject$3;
var aPossiblePrototype = aPossiblePrototype$1;

// `Object.setPrototypeOf` method
// https://tc39.es/ecma262/#sec-object.setprototypeof
// Works with __proto__ only. Old v8 can't work with null proto objects.
// eslint-disable-next-line es/no-object-setprototypeof -- safe
var objectSetPrototypeOf = Object.setPrototypeOf || ('__proto__' in {} ? function () {
  var CORRECT_SETTER = false;
  var test = {};
  var setter;
  try {
    // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
    setter = uncurryThis$1(Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set);
    setter(test, []);
    CORRECT_SETTER = test instanceof Array;
  } catch (error) { /* empty */ }
  return function setPrototypeOf(O, proto) {
    anObject(O);
    aPossiblePrototype(proto);
    if (CORRECT_SETTER) setter(O, proto);
    else O.__proto__ = proto;
    return O;
  };
}() : undefined);

var defineProperty = objectDefineProperty.f;

var proxyAccessor$1 = function (Target, Source, key) {
  key in Target || defineProperty(Target, key, {
    configurable: true,
    get: function () { return Source[key]; },
    set: function (it) { Source[key] = it; }
  });
};

var isCallable$1 = isCallable$d;
var isObject$1 = isObject$7;
var setPrototypeOf$1 = objectSetPrototypeOf;

// makes subclassing work correct for wrapped built-ins
var inheritIfRequired$1 = function ($this, dummy, Wrapper) {
  var NewTarget, NewTargetPrototype;
  if (
    // it can work only with native `setPrototypeOf`
    setPrototypeOf$1 &&
    // we haven't completely correct pre-ES6 way for getting `new.target`, so use this
    isCallable$1(NewTarget = dummy.constructor) &&
    NewTarget !== Wrapper &&
    isObject$1(NewTargetPrototype = NewTarget.prototype) &&
    NewTargetPrototype !== Wrapper.prototype
  ) setPrototypeOf$1($this, NewTargetPrototype);
  return $this;
};

var wellKnownSymbol$1 = wellKnownSymbol$3;

var TO_STRING_TAG$1 = wellKnownSymbol$1('toStringTag');
var test = {};

test[TO_STRING_TAG$1] = 'z';

var toStringTagSupport = String(test) === '[object z]';

var TO_STRING_TAG_SUPPORT = toStringTagSupport;
var isCallable = isCallable$d;
var classofRaw = classofRaw$1;
var wellKnownSymbol = wellKnownSymbol$3;

var TO_STRING_TAG = wellKnownSymbol('toStringTag');
var $Object = Object;

// ES3 wrong here
var CORRECT_ARGUMENTS = classofRaw(function () { return arguments; }()) == 'Arguments';

// fallback for IE11 Script Access Denied error
var tryGet = function (it, key) {
  try {
    return it[key];
  } catch (error) { /* empty */ }
};

// getting tag from ES6+ `Object.prototype.toString`
var classof$1 = TO_STRING_TAG_SUPPORT ? classofRaw : function (it) {
  var O, tag, result;
  return it === undefined ? 'Undefined' : it === null ? 'Null'
    // @@toStringTag case
    : typeof (tag = tryGet(O = $Object(it), TO_STRING_TAG)) == 'string' ? tag
    // builtinTag case
    : CORRECT_ARGUMENTS ? classofRaw(O)
    // ES3 arguments fallback
    : (result = classofRaw(O)) == 'Object' && isCallable(O.callee) ? 'Arguments' : result;
};

var classof = classof$1;

var $String = String;

var toString$1 = function (argument) {
  if (classof(argument) === 'Symbol') throw TypeError('Cannot convert a Symbol value to a string');
  return $String(argument);
};

var toString = toString$1;

var normalizeStringArgument$1 = function (argument, $default) {
  return argument === undefined ? arguments.length < 2 ? '' : $default : toString(argument);
};

var isObject = isObject$7;
var createNonEnumerableProperty$1 = createNonEnumerableProperty$4;

// `InstallErrorCause` abstract operation
// https://tc39.es/proposal-error-cause/#sec-errorobjects-install-error-cause
var installErrorCause$1 = function (O, options) {
  if (isObject(options) && 'cause' in options) {
    createNonEnumerableProperty$1(O, 'cause', options.cause);
  }
};

var uncurryThis = functionUncurryThis;

var $Error = Error;
var replace = uncurryThis(''.replace);

var TEST = (function (arg) { return String($Error(arg).stack); })('zxcasd');
var V8_OR_CHAKRA_STACK_ENTRY = /\n\s*at [^:]*:[^\n]*/;
var IS_V8_OR_CHAKRA_STACK = V8_OR_CHAKRA_STACK_ENTRY.test(TEST);

var errorStackClear = function (stack, dropEntries) {
  if (IS_V8_OR_CHAKRA_STACK && typeof stack == 'string' && !$Error.prepareStackTrace) {
    while (dropEntries--) stack = replace(stack, V8_OR_CHAKRA_STACK_ENTRY, '');
  } return stack;
};

var fails = fails$a;
var createPropertyDescriptor = createPropertyDescriptor$3;

var errorStackInstallable = !fails(function () {
  var error = Error('a');
  if (!('stack' in error)) return true;
  // eslint-disable-next-line es/no-object-defineproperty -- safe
  Object.defineProperty(error, 'stack', createPropertyDescriptor(1, 7));
  return error.stack !== 7;
});

var getBuiltIn = getBuiltIn$4;
var hasOwn = hasOwnProperty_1;
var createNonEnumerableProperty = createNonEnumerableProperty$4;
var isPrototypeOf = objectIsPrototypeOf;
var setPrototypeOf = objectSetPrototypeOf;
var copyConstructorProperties = copyConstructorProperties$2;
var proxyAccessor = proxyAccessor$1;
var inheritIfRequired = inheritIfRequired$1;
var normalizeStringArgument = normalizeStringArgument$1;
var installErrorCause = installErrorCause$1;
var clearErrorStack = errorStackClear;
var ERROR_STACK_INSTALLABLE = errorStackInstallable;
var DESCRIPTORS = descriptors;

var wrapErrorConstructorWithCause$1 = function (FULL_NAME, wrapper, FORCED, IS_AGGREGATE_ERROR) {
  var STACK_TRACE_LIMIT = 'stackTraceLimit';
  var OPTIONS_POSITION = IS_AGGREGATE_ERROR ? 2 : 1;
  var path = FULL_NAME.split('.');
  var ERROR_NAME = path[path.length - 1];
  var OriginalError = getBuiltIn.apply(null, path);

  if (!OriginalError) return;

  var OriginalErrorPrototype = OriginalError.prototype;

  // V8 9.3- bug https://bugs.chromium.org/p/v8/issues/detail?id=12006
  if (hasOwn(OriginalErrorPrototype, 'cause')) delete OriginalErrorPrototype.cause;

  if (!FORCED) return OriginalError;

  var BaseError = getBuiltIn('Error');

  var WrappedError = wrapper(function (a, b) {
    var message = normalizeStringArgument(IS_AGGREGATE_ERROR ? b : a, undefined);
    var result = IS_AGGREGATE_ERROR ? new OriginalError(a) : new OriginalError();
    if (message !== undefined) createNonEnumerableProperty(result, 'message', message);
    if (ERROR_STACK_INSTALLABLE) createNonEnumerableProperty(result, 'stack', clearErrorStack(result.stack, 2));
    if (this && isPrototypeOf(OriginalErrorPrototype, this)) inheritIfRequired(result, this, WrappedError);
    if (arguments.length > OPTIONS_POSITION) installErrorCause(result, arguments[OPTIONS_POSITION]);
    return result;
  });

  WrappedError.prototype = OriginalErrorPrototype;

  if (ERROR_NAME !== 'Error') {
    if (setPrototypeOf) setPrototypeOf(WrappedError, BaseError);
    else copyConstructorProperties(WrappedError, BaseError, { name: true });
  } else if (DESCRIPTORS && STACK_TRACE_LIMIT in OriginalError) {
    proxyAccessor(WrappedError, OriginalError, STACK_TRACE_LIMIT);
    proxyAccessor(WrappedError, OriginalError, 'prepareStackTrace');
  }

  copyConstructorProperties(WrappedError, OriginalError);

  try {
    // Safari 13- bug: WebAssembly errors does not have a proper `.name`
    if (OriginalErrorPrototype.name !== ERROR_NAME) {
      createNonEnumerableProperty(OriginalErrorPrototype, 'name', ERROR_NAME);
    }
    OriginalErrorPrototype.constructor = WrappedError;
  } catch (error) { /* empty */ }

  return WrappedError;
};

/* eslint-disable no-unused-vars -- required for functions `.length` */

var $$1 = _export;
var global$1 = global$b;
var apply = functionApply;
var wrapErrorConstructorWithCause = wrapErrorConstructorWithCause$1;

var WEB_ASSEMBLY = 'WebAssembly';
var WebAssembly = global$1[WEB_ASSEMBLY];

var FORCED = Error('e', { cause: 7 }).cause !== 7;

var exportGlobalErrorCauseWrapper = function (ERROR_NAME, wrapper) {
  var O = {};
  O[ERROR_NAME] = wrapErrorConstructorWithCause(ERROR_NAME, wrapper, FORCED);
  $$1({ global: true, constructor: true, arity: 1, forced: FORCED }, O);
};

var exportWebAssemblyErrorCauseWrapper = function (ERROR_NAME, wrapper) {
  if (WebAssembly && WebAssembly[ERROR_NAME]) {
    var O = {};
    O[ERROR_NAME] = wrapErrorConstructorWithCause(WEB_ASSEMBLY + '.' + ERROR_NAME, wrapper, FORCED);
    $$1({ target: WEB_ASSEMBLY, stat: true, constructor: true, arity: 1, forced: FORCED }, O);
  }
};

// https://github.com/tc39/proposal-error-cause
exportGlobalErrorCauseWrapper('Error', function (init) {
  return function Error(message) { return apply(init, this, arguments); };
});
exportGlobalErrorCauseWrapper('EvalError', function (init) {
  return function EvalError(message) { return apply(init, this, arguments); };
});
exportGlobalErrorCauseWrapper('RangeError', function (init) {
  return function RangeError(message) { return apply(init, this, arguments); };
});
exportGlobalErrorCauseWrapper('ReferenceError', function (init) {
  return function ReferenceError(message) { return apply(init, this, arguments); };
});
exportGlobalErrorCauseWrapper('SyntaxError', function (init) {
  return function SyntaxError(message) { return apply(init, this, arguments); };
});
exportGlobalErrorCauseWrapper('TypeError', function (init) {
  return function TypeError(message) { return apply(init, this, arguments); };
});
exportGlobalErrorCauseWrapper('URIError', function (init) {
  return function URIError(message) { return apply(init, this, arguments); };
});
exportWebAssemblyErrorCauseWrapper('CompileError', function (init) {
  return function CompileError(message) { return apply(init, this, arguments); };
});
exportWebAssemblyErrorCauseWrapper('LinkError', function (init) {
  return function LinkError(message) { return apply(init, this, arguments); };
});
exportWebAssemblyErrorCauseWrapper('RuntimeError', function (init) {
  return function RuntimeError(message) { return apply(init, this, arguments); };
});

const WHITES = {
  // for compatibility, the four-digit chromaticity-derived ones everyone else uses
  D50: [0.3457 / 0.3585, 1.00000, (1.0 - 0.3457 - 0.3585) / 0.3585],
  D65: [0.3127 / 0.3290, 1.00000, (1.0 - 0.3127 - 0.3290) / 0.3290]
};
function getWhite(name) {
  if (Array.isArray(name)) {
    return name;
  }

  return WHITES[name];
} // Adapt XYZ from white point W1 to W2

function adapt(W1, W2, XYZ) {
  let options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
  W1 = getWhite(W1);
  W2 = getWhite(W2);

  if (!W1 || !W2) {
    throw new TypeError(`Missing white point to convert ${!W1 ? "from" : ""}${!W1 && !W2 ? "/" : ""}${!W2 ? "to" : ""}`);
  }

  if (W1 === W2) {
    // Same whitepoints, no conversion needed
    return XYZ;
  }

  let env = {
    W1,
    W2,
    XYZ,
    options
  };
  hooks$1.run("chromatic-adaptation-start", env);

  if (!env.M) {
    if (env.W1 === WHITES.D65 && env.W2 === WHITES.D50) {
      env.M = [[1.0479298208405488, 0.022946793341019088, -0.05019222954313557], [0.029627815688159344, 0.990434484573249, -0.01707382502938514], [-0.009243058152591178, 0.015055144896577895, 0.7518742899580008]];
    } else if (env.W1 === WHITES.D50 && env.W2 === WHITES.D65) {
      env.M = [[0.9554734527042182, -0.023098536874261423, 0.0632593086610217], [-0.028369706963208136, 1.0099954580058226, 0.021041398966943008], [0.012314001688319899, -0.020507696433477912, 1.3303659366080753]];
    }
  }

  hooks$1.run("chromatic-adaptation-end", env);

  if (env.M) {
    return multiplyMatrices(env.M, env.XYZ);
  } else {
    throw new TypeError("Only Bradford CAT with white points D50 and D65 supported for now.");
  }
}

const ε$4 = .000075;
/**
 * Class to represent a color space
 */

var _processFormat = /*#__PURE__*/new WeakSet();

var _path = /*#__PURE__*/new WeakMap();

var _getPath = /*#__PURE__*/new WeakSet();

class ColorSpace {
  constructor(options) {
    var _options$coords, _ref, _options$white, _options$formats, _this$formats$functio, _this$formats, _this$formats2;

    _classPrivateMethodInitSpec(this, _getPath);

    _classPrivateMethodInitSpec(this, _processFormat);

    _classPrivateFieldInitSpec(this, _path, {
      writable: true,
      value: void 0
    });

    this.id = options.id;
    this.name = options.name;
    this.base = options.base ? ColorSpace.get(options.base) : null;
    this.aliases = options.aliases;

    if (this.base) {
      this.fromBase = options.fromBase;
      this.toBase = options.toBase;
    } // Coordinate metadata


    let _coords = (_options$coords = options.coords) !== null && _options$coords !== void 0 ? _options$coords : this.base.coords;

    this.coords = _coords; // White point

    let white = (_ref = (_options$white = options.white) !== null && _options$white !== void 0 ? _options$white : this.base.white) !== null && _ref !== void 0 ? _ref : "D65";
    this.white = getWhite(white); // Sort out formats

    this.formats = (_options$formats = options.formats) !== null && _options$formats !== void 0 ? _options$formats : {};

    for (let name in this.formats) {
      let format = this.formats[name];
      format.type || (format.type = "function");
      format.name || (format.name = name);
    }

    if (options.cssId && !((_this$formats$functio = this.formats.functions) !== null && _this$formats$functio !== void 0 && _this$formats$functio.color)) {
      this.formats.color = {
        id: options.cssId
      };
      Object.defineProperty(this, "cssId", {
        value: options.cssId
      });
    } else if ((_this$formats = this.formats) !== null && _this$formats !== void 0 && _this$formats.color && !((_this$formats2 = this.formats) !== null && _this$formats2 !== void 0 && _this$formats2.color.id)) {
      this.formats.color.id = this.id;
    } // Other stuff


    this.referred = options.referred; // Compute ancestors and store them, since they will never change

    _classPrivateFieldSet(this, _path, _classPrivateMethodGet(this, _getPath, _getPath2).call(this).reverse());

    hooks$1.run("colorspace-init-end", this);
  }

  inGamut(coords) {
    let {
      epsilon = ε$4
    } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

    if (this.isPolar) {
      // Do not check gamut through polar coordinates
      coords = this.toBase(coords);
      return this.base.inGamut(coords, {
        epsilon
      });
    }

    let coordMeta = Object.values(this.coords);
    return coords.every((c, i) => {
      let meta = coordMeta[i];

      if (meta.type !== "angle" && meta.range) {
        if (Number.isNaN(c)) {
          // NaN is always in gamut
          return true;
        }

        let [min, max] = meta.range;
        return (min === undefined || c >= min - epsilon) && (max === undefined || c <= max + epsilon);
      }

      return true;
    });
  }

  get cssId() {
    var _this$formats$functio2, _this$formats$functio3;

    return ((_this$formats$functio2 = this.formats.functions) === null || _this$formats$functio2 === void 0 ? void 0 : (_this$formats$functio3 = _this$formats$functio2.color) === null || _this$formats$functio3 === void 0 ? void 0 : _this$formats$functio3.id) || this.id;
  }

  get isPolar() {
    for (let id in this.coords) {
      if (this.coords[id].type === "angle") {
        return true;
      }
    }

    return false;
  }

  getFormat(format) {
    if (typeof format === "object") {
      format = _classPrivateMethodGet(this, _processFormat, _processFormat2).call(this, format);
      return format;
    }

    let ret;

    if (format === "default") {
      // Get first format
      ret = Object.values(this.formats)[0];
    } else {
      ret = this.formats[format];
    }

    if (ret) {
      ret = _classPrivateMethodGet(this, _processFormat, _processFormat2).call(this, ret);
      return ret;
    }

    return null;
  }

  to(space, coords) {
    if (arguments.length === 1) {
      [space, coords] = [space.space, space.coords];
    }

    space = ColorSpace.get(space);

    if (this === space) {
      // Same space, no change needed
      return coords;
    } // Convert NaN to 0, which seems to be valid in every coordinate of every color space


    coords = coords.map(c => Number.isNaN(c) ? 0 : c); // Find connection space = lowest common ancestor in the base tree

    let myPath = _classPrivateFieldGet(this, _path);

    let otherPath = _classPrivateFieldGet(space, _path);

    let connectionSpace, connectionSpaceIndex;

    for (let i = 0; i < myPath.length; i++) {
      if (myPath[i] === otherPath[i]) {
        connectionSpace = myPath[i];
        connectionSpaceIndex = i;
      } else {
        break;
      }
    }

    if (!connectionSpace) {
      // This should never happen
      throw new Error(`Cannot convert between color spaces ${this} and ${space}: no connection space was found`);
    } // Go up from current space to connection space


    for (let i = myPath.length - 1; i > connectionSpaceIndex; i--) {
      coords = myPath[i].toBase(coords);
    } // Go down from connection space to target space


    for (let i = connectionSpaceIndex + 1; i < otherPath.length; i++) {
      coords = otherPath[i].fromBase(coords);
    }

    return coords;
  }

  from(space, coords) {
    if (arguments.length === 1) {
      [space, coords] = [space.space, space.coords];
    }

    space = ColorSpace.get(space);
    return space.to(this, coords);
  }

  toString() {
    return `${this.name} (${this.id})`;
  }

  getMinCoords() {
    let ret = [];

    for (let id in this.coords) {
      var _range$min;

      let meta = this.coords[id];
      let range = meta.range || meta.refRange;
      ret.push((_range$min = range === null || range === void 0 ? void 0 : range.min) !== null && _range$min !== void 0 ? _range$min : 0);
    }

    return ret;
  }

  // Returns array of unique color spaces
  static get all() {
    return [...new Set(Object.values(ColorSpace.registry))];
  }

  static register(id, space) {
    if (arguments.length === 1) {
      space = arguments[0];
      id = space.id;
    }

    space = this.get(space);

    if (this.registry[id] && this.registry[id] !== space) {
      throw new Error(`Duplicate color space registration: '${id}'`);
    }

    this.registry[id] = space; // Register aliases when called without an explicit ID.

    if (arguments.length === 1 && space.aliases) {
      for (let alias of space.aliases) {
        this.register(alias, space);
      }
    }

    return space;
  }
  /**
   * Lookup ColorSpace object by name
   * @param {ColorSpace | string} name
   */


  static get(space) {
    if (!space || space instanceof ColorSpace) {
      return space;
    }

    let argType = type(space);

    if (argType === "string") {
      // It's a color space id
      let ret = ColorSpace.registry[space.toLowerCase()];

      if (!ret) {
        throw new TypeError(`No color space found with id = "${space}"`);
      }

      return ret;
    }

    for (var _len = arguments.length, alternatives = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
      alternatives[_key - 1] = arguments[_key];
    }

    if (alternatives.length) {
      return ColorSpace.get(...alternatives);
    }

    throw new TypeError(`${space} is not a valid color space`);
  }
  /**
   * Get metadata about a coordinate of a color space
   *
   * @static
   * @param {Array | string} ref
   * @param {ColorSpace | string} [workingSpace]
   * @return {Object}
   */


  static resolveCoord(ref, workingSpace) {
    let coordType = type(ref);
    let space, coord;

    if (coordType === "string") {
      if (ref.includes(".")) {
        // Absolute coordinate
        [space, coord] = ref.split(".");
      } else {
        // Relative coordinate
        [space, coord] = [, ref];
      }
    } else if (Array.isArray(ref)) {
      [space, coord] = ref;
    } else {
      // Object
      space = ref.space;
      coord = ref.coordId;
    }

    space = ColorSpace.get(space);

    if (!space) {
      space = workingSpace;
    }

    if (!space) {
      throw new TypeError(`Cannot resolve coordinate reference ${ref}: No color space specified and relative references are not allowed here`);
    }

    coordType = type(coord);

    if (coordType === "number" || coordType === "string" && coord >= 0) {
      // Resolve numerical coord
      let meta = Object.entries(space.coords)[coord];

      if (meta) {
        return {
          space,
          id: meta[0],
          index: coord,
          ...meta[1]
        };
      }
    }

    space = ColorSpace.get(space);
    let normalizedCoord = coord.toLowerCase();
    let i = 0;

    for (let id in space.coords) {
      var _meta$name;

      let meta = space.coords[id];

      if (id.toLowerCase() === normalizedCoord || ((_meta$name = meta.name) === null || _meta$name === void 0 ? void 0 : _meta$name.toLowerCase()) === normalizedCoord) {
        return {
          space,
          id,
          index: i,
          ...meta
        };
      }

      i++;
    }

    throw new TypeError(`No "${coord}" coordinate found in ${space.name}. Its coordinates are: ${Object.keys(space.coords).join(", ")}`);
  }

}

function _processFormat2(format) {
  if (format.coords && !format.coordGrammar) {
    format.type || (format.type = "function");
    format.name || (format.name = "color"); // Format has not been processed

    format.coordGrammar = parseCoordGrammar(format.coords);
    let coordFormats = Object.entries(this.coords).map((_ref2, i) => {
      let [id, coordMeta] = _ref2;
      // Preferred format for each coord is the first one
      let outputType = format.coordGrammar[i][0];
      let fromRange = coordMeta.range || coordMeta.refRange;
      let toRange = outputType.range,
          suffix = ""; // Non-strict equals intentional since outputType could be a string object

      if (outputType == "<percentage>") {
        toRange = [0, 100];
        suffix = "%";
      } else if (outputType == "<angle>") {
        suffix = "deg";
      }

      return {
        fromRange,
        toRange,
        suffix
      };
    });

    format.serializeCoords = (coords, precision) => {
      return coords.map((c, i) => {
        let {
          fromRange,
          toRange,
          suffix
        } = coordFormats[i];

        if (fromRange && toRange) {
          c = mapRange(fromRange, toRange, c);
        }

        c = toPrecision(c, precision);

        if (suffix) {
          c += suffix;
        }

        return c;
      });
    };
  }

  return format;
}

function _getPath2() {
  let ret = [this];

  for (let space = this; space = space.base;) {
    ret.push(space);
  }

  return ret;
}

_defineProperty(ColorSpace, "registry", {});

_defineProperty(ColorSpace, "DEFAULT_FORMAT", {
  type: "functions",
  name: "color"
});

var XYZ_D65 = new ColorSpace({
  id: "xyz-d65",
  name: "XYZ D65",
  coords: {
    x: {
      name: "X"
    },
    y: {
      name: "Y"
    },
    z: {
      name: "Z"
    }
  },
  white: "D65",
  formats: {
    color: {
      ids: ['xyz-d65', 'xyz']
    }
  },
  aliases: ['xyz']
});

/**
 * Convenience class for RGB color spaces
 * @extends {ColorSpace}
 */

class RGBColorSpace extends ColorSpace {
  /**
   * Creates a new RGB ColorSpace.
   * If coords are not specified, they will use the default RGB coords.
   * Instead of `fromBase()` and `toBase()` functions,
   * you can specify to/from XYZ matrices and have `toBase()` and `fromBase()` automatically generated.
   * @param {*} options - Same options as {@link ColorSpace} plus:
   * @param {number[][]} options.toXYZ_M - Matrix to convert to XYZ
   * @param {number[][]} options.fromXYZ_M - Matrix to convert from XYZ
   */
  constructor(options) {
    var _options$referred;

    if (!options.coords) {
      options.coords = {
        r: {
          range: [0, 1],
          name: "Red"
        },
        g: {
          range: [0, 1],
          name: "Green"
        },
        b: {
          range: [0, 1],
          name: "Blue"
        }
      };
    }

    if (!options.base) {
      options.base = XYZ_D65;
    }

    if (options.toXYZ_M && options.fromXYZ_M) {
      var _options$toBase, _options$fromBase;

      (_options$toBase = options.toBase) !== null && _options$toBase !== void 0 ? _options$toBase : options.toBase = rgb => {
        let xyz = multiplyMatrices(options.toXYZ_M, rgb);

        if (this.white !== this.base.white) {
          // Perform chromatic adaptation
          xyz = adapt(this.white, this.base.white, xyz);
        }

        return xyz;
      };
      (_options$fromBase = options.fromBase) !== null && _options$fromBase !== void 0 ? _options$fromBase : options.fromBase = xyz => {
        xyz = adapt(this.base.white, this.white, xyz);
        return multiplyMatrices(options.fromXYZ_M, xyz);
      };
    }

    (_options$referred = options.referred) !== null && _options$referred !== void 0 ? _options$referred : options.referred = "display";
    super(options);
  }

}

function parse(str) {
  var _String;

  let env = {
    "str": (_String = String(str)) === null || _String === void 0 ? void 0 : _String.trim()
  };
  hooks$1.run("parse-start", env);

  if (env.color) {
    return env.color;
  }

  env.parsed = parseFunction(env.str);

  if (env.parsed) {
    // Is a functional syntax
    let name = env.parsed.name;

    if (name === "color") {
      // color() function
      let id = env.parsed.args.shift();
      let alpha = env.parsed.rawArgs.indexOf("/") > 0 ? env.parsed.args.pop() : 1;

      for (let space of ColorSpace.all) {
        let colorSpec = space.getFormat("color");

        if (colorSpec) {
          var _colorSpec$ids;

          if (id === colorSpec.id || (_colorSpec$ids = colorSpec.ids) !== null && _colorSpec$ids !== void 0 && _colorSpec$ids.includes(id)) {
            // From https://drafts.csswg.org/css-color-4/#color-function
            // If more <number>s or <percentage>s are provided than parameters that the colorspace takes, the excess <number>s at the end are ignored.
            // If less <number>s or <percentage>s are provided than parameters that the colorspace takes, the missing parameters default to 0. (This is particularly convenient for multichannel printers where the additional inks are spot colors or varnishes that most colors on the page won’t use.)
            let argCount = Object.keys(space.coords).length;
            let coords = Array(argCount).fill(0);
            coords.forEach((_, i) => coords[i] = env.parsed.args[i] || 0);
            return {
              spaceId: space.id,
              coords,
              alpha
            };
          }
        }
      } // Not found


      let didYouMean = "";

      if (id in ColorSpace.registry) {
        var _ColorSpace$registry$, _ColorSpace$registry$2, _ColorSpace$registry$3;

        // Used color space id instead of color() id, these are often different
        let cssId = (_ColorSpace$registry$ = ColorSpace.registry[id].formats) === null || _ColorSpace$registry$ === void 0 ? void 0 : (_ColorSpace$registry$2 = _ColorSpace$registry$.functions) === null || _ColorSpace$registry$2 === void 0 ? void 0 : (_ColorSpace$registry$3 = _ColorSpace$registry$2.color) === null || _ColorSpace$registry$3 === void 0 ? void 0 : _ColorSpace$registry$3.id;

        if (cssId) {
          didYouMean = `Did you mean color(${cssId})?`;
        }
      }

      throw new TypeError(`Cannot parse color(${id}). ` + (didYouMean || "Missing a plugin?"));
    } else {
      for (let space of ColorSpace.all) {
        // color space specific function
        let format = space.getFormat(name);

        if (format && format.type === "function") {
          let alpha = 1;

          if (format.lastAlpha || last(env.parsed.args).alpha) {
            alpha = env.parsed.args.pop();
          }

          let coords = env.parsed.args;

          if (format.coordGrammar) {
            Object.entries(space.coords).forEach((_ref, i) => {
              var _coords$i;

              let [id, coordMeta] = _ref;
              let coordGrammar = format.coordGrammar[i];
              let providedType = (_coords$i = coords[i]) === null || _coords$i === void 0 ? void 0 : _coords$i.type; // Find grammar alternative that matches the provided type
              // Non-strict equals is intentional because we are comparing w/ string objects

              coordGrammar = coordGrammar.find(c => c == providedType); // Check that each coord conforms to its grammar

              if (!coordGrammar) {
                // Type does not exist in the grammar, throw
                let coordName = coordMeta.name || id;
                throw new TypeError(`${providedType} not allowed for ${coordName} in ${name}()`);
              }

              let fromRange = coordGrammar.range;

              if (providedType === "<percentage>") {
                fromRange || (fromRange = [0, 1]);
              }

              let toRange = coordMeta.range || coordMeta.refRange;

              if (fromRange && toRange) {
                coords[i] = mapRange(fromRange, toRange, coords[i]);
              }
            });
          }

          return {
            spaceId: space.id,
            coords,
            alpha
          };
        }
      }
    }
  } else {
    // Custom, colorspace-specific format
    for (let space of ColorSpace.all) {
      for (let formatId in space.formats) {
        let format = space.formats[formatId];

        if (format.type !== "custom") {
          continue;
        }

        if (format.test && !format.test(env.str)) {
          continue;
        }

        let color = format.parse(env.str);

        if (color) {
          var _color$alpha;

          (_color$alpha = color.alpha) !== null && _color$alpha !== void 0 ? _color$alpha : color.alpha = 1;
          return color;
        }
      }
    }
  } // If we're here, we couldn't parse


  throw new TypeError(`Could not parse ${str} as a color. Missing a plugin?`);
}

/**
 * Resolves a color reference (object or string) to a plain color object
 * @param {Color | {space, coords, alpha} | string} color
 * @returns {{space, coords, alpha}}
 */

function getColor(color) {
  if (!color) {
    throw new TypeError("Empty color reference");
  }

  if (isString(color)) {
    color = parse(color);
  } // Object fixup


  let space = color.space || color.spaceId;

  if (!(space instanceof ColorSpace)) {
    // Convert string id to color space object
    color.space = ColorSpace.get(space);
  }

  if (color.alpha === undefined) {
    color.alpha = 1;
  }

  return color;
}

/**
 * Get the coordinates of a color in another color space
 *
 * @param {string | ColorSpace} space
 * @returns {number[]}
 */

function getAll(color, space) {
  space = ColorSpace.get(space);
  return space.from(color);
}

function get(color, prop) {
  let {
    space,
    index
  } = ColorSpace.resolveCoord(prop, color.space);
  let coords = getAll(color, space);
  return coords[index];
}

function setAll(color, space, coords) {
  space = ColorSpace.get(space);
  color.coords = space.to(color.space, coords);
  return color;
}

function set$1(color, prop, value) {
  color = getColor(color);

  if (arguments.length === 2 && type(arguments[1]) === "object") {
    // Argument is an object literal
    let object = arguments[1];

    for (let p in object) {
      set$1(color, p, object[p]);
    }
  } else {
    if (typeof value === "function") {
      value = value(get(color, prop));
    }

    let {
      space,
      index
    } = ColorSpace.resolveCoord(prop, color.space);
    let coords = getAll(color, space);
    coords[index] = value;
    setAll(color, space, coords);
  }

  return color;
}

var XYZ_D50 = new ColorSpace({
  id: "xyz-d50",
  name: "XYZ D50",
  white: "D50",
  base: XYZ_D65,
  fromBase: coords => adapt(XYZ_D65.white, "D50", coords),
  toBase: coords => adapt("D50", XYZ_D65.white, coords),
  formats: {
    color: {}
  }
});

const ε$3 = 216 / 24389; // 6^3/29^3 == (24/116)^3

const ε3$1 = 24 / 116;
const κ$1 = 24389 / 27; // 29^3/3^3

let white$1 = WHITES.D50;
var lab = new ColorSpace({
  id: "lab",
  name: "Lab",
  coords: {
    l: {
      refRange: [0, 100],
      name: "L"
    },
    a: {
      refRange: [-125, 125]
    },
    b: {
      refRange: [-125, 125]
    }
  },
  // Assuming XYZ is relative to D50, convert to CIE Lab
  // from CIE standard, which now defines these as a rational fraction
  white: white$1,
  base: XYZ_D50,

  // Convert D50-adapted XYX to Lab
  //  CIE 15.3:2004 section 8.2.1.1
  fromBase(XYZ) {
    // compute xyz, which is XYZ scaled relative to reference white
    let xyz = XYZ.map((value, i) => value / white$1[i]); // now compute f

    let f = xyz.map(value => value > ε$3 ? Math.cbrt(value) : (κ$1 * value + 16) / 116);
    return [116 * f[1] - 16, // L
    500 * (f[0] - f[1]), // a
    200 * (f[1] - f[2]) // b
    ];
  },

  // Convert Lab to D50-adapted XYZ
  // Same result as CIE 15.3:2004 Appendix D although the derivation is different
  // http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html
  toBase(Lab) {
    // compute f, starting with the luminance-related term
    let f = [];
    f[1] = (Lab[0] + 16) / 116;
    f[0] = Lab[1] / 500 + f[1];
    f[2] = f[1] - Lab[2] / 200; // compute xyz

    let xyz = [f[0] > ε3$1 ? Math.pow(f[0], 3) : (116 * f[0] - 16) / κ$1, Lab[0] > 8 ? Math.pow((Lab[0] + 16) / 116, 3) : Lab[0] / κ$1, f[2] > ε3$1 ? Math.pow(f[2], 3) : (116 * f[2] - 16) / κ$1]; // Compute XYZ by scaling xyz by reference white

    return xyz.map((value, i) => value * white$1[i]);
  },

  formats: {
    "lab": {
      coords: ["<number> | <percentage>", "<number>", "<number>"]
    }
  }
});

function constrain(angle) {
  return (angle % 360 + 360) % 360;
}
function adjust(arc, angles) {
  if (arc === "raw") {
    return angles;
  }

  let [a1, a2] = angles.map(constrain);
  let angleDiff = a2 - a1;

  if (arc === "increasing") {
    if (angleDiff < 0) {
      a2 += 360;
    }
  } else if (arc === "decreasing") {
    if (angleDiff > 0) {
      a1 += 360;
    }
  } else if (arc === "longer") {
    if (-180 < angleDiff && angleDiff < 180) {
      if (angleDiff > 0) {
        a2 += 360;
      } else {
        a1 += 360;
      }
    }
  } else if (arc === "shorter") {
    if (angleDiff > 180) {
      a1 += 360;
    } else if (angleDiff < -180) {
      a2 += 360;
    }
  }

  return [a1, a2];
}

var lch = new ColorSpace({
  id: "lch",
  name: "LCH",
  coords: {
    l: {
      refRange: [0, 100],
      name: "Lightness"
    },
    c: {
      refRange: [0, 150],
      name: "Chroma"
    },
    h: {
      refRange: [0, 360],
      type: "angle",
      name: "Hue"
    }
  },
  base: lab,

  fromBase(Lab) {
    // Convert to polar form
    let [L, a, b] = Lab;
    let hue;
    const ε = 0.02;

    if (Math.abs(a) < ε && Math.abs(b) < ε) {
      hue = NaN;
    } else {
      hue = Math.atan2(b, a) * 180 / Math.PI;
    }

    return [L, // L is still L
    Math.sqrt(a ** 2 + b ** 2), // Chroma
    constrain(hue) // Hue, in degrees [0 to 360)
    ];
  },

  toBase(LCH) {
    // Convert from polar form
    let [Lightness, Chroma, Hue] = LCH; // Clamp any negative Chroma

    if (Chroma < 0) {
      Chroma = 0;
    }

    if (isNaN(Hue)) {
      Hue = 0;
    }

    return [Lightness, // L is still L
    Chroma * Math.cos(Hue * Math.PI / 180), // a
    Chroma * Math.sin(Hue * Math.PI / 180) // b
    ];
  },

  formats: {
    "lch": {
      coords: ["<number> | <percentage>", "<number>", "<number> | <angle>"]
    }
  }
});

// and is recommended by the CIE and Idealliance
// especially for color differences less than 10 deltaE76
// but is wicked complicated
// and many implementations have small errors!
// DeltaE2000 is also discontinuous; in case this
// matters to you, use deltaECMC instead.

const Gfactor = 25 ** 7;
const π$1 = Math.PI;
const r2d = 180 / π$1;
const d2r$1 = π$1 / 180;
function deltaE2000 (color, sample) {
  let {
    kL = 1,
    kC = 1,
    kH = 1
  } = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
  // Given this color as the reference
  // and the function parameter as the sample,
  // calculate deltaE 2000.
  // This implementation assumes the parametric
  // weighting factors kL, kC and kH
  // for the influence of viewing conditions
  // are all 1, as sadly seems typical.
  // kL should be increased for lightness texture or noise
  // and kC increased for chroma noise
  let [L1, a1, b1] = lab.from(color);
  let C1 = lch.from(lab, [L1, a1, b1])[1];
  let [L2, a2, b2] = lab.from(sample);
  let C2 = lch.from(lab, [L2, a2, b2])[1]; // Check for negative Chroma,
  // which might happen through
  // direct user input of LCH values

  if (C1 < 0) {
    C1 = 0;
  }

  if (C2 < 0) {
    C2 = 0;
  }

  let Cbar = (C1 + C2) / 2; // mean Chroma
  // calculate a-axis asymmetry factor from mean Chroma
  // this turns JND ellipses for near-neutral colors back into circles

  let C7 = Cbar ** 7;
  let G = 0.5 * (1 - Math.sqrt(C7 / (C7 + Gfactor))); // scale a axes by asymmetry factor
  // this by the way is why there is no Lab2000 colorspace

  let adash1 = (1 + G) * a1;
  let adash2 = (1 + G) * a2; // calculate new Chroma from scaled a and original b axes

  let Cdash1 = Math.sqrt(adash1 ** 2 + b1 ** 2);
  let Cdash2 = Math.sqrt(adash2 ** 2 + b2 ** 2); // calculate new hues, with zero hue for true neutrals
  // and in degrees, not radians

  let h1 = adash1 === 0 && b1 === 0 ? 0 : Math.atan2(b1, adash1);
  let h2 = adash2 === 0 && b2 === 0 ? 0 : Math.atan2(b2, adash2);

  if (h1 < 0) {
    h1 += 2 * π$1;
  }

  if (h2 < 0) {
    h2 += 2 * π$1;
  }

  h1 *= r2d;
  h2 *= r2d; // Lightness and Chroma differences; sign matters

  let ΔL = L2 - L1;
  let ΔC = Cdash2 - Cdash1; // Hue difference, getting the sign correct

  let hdiff = h2 - h1;
  let hsum = h1 + h2;
  let habs = Math.abs(hdiff);
  let Δh;

  if (Cdash1 * Cdash2 === 0) {
    Δh = 0;
  } else if (habs <= 180) {
    Δh = hdiff;
  } else if (hdiff > 180) {
    Δh = hdiff - 360;
  } else if (hdiff < -180) {
    Δh = hdiff + 360;
  } else {
    console.log("the unthinkable has happened");
  } // weighted Hue difference, more for larger Chroma


  let ΔH = 2 * Math.sqrt(Cdash2 * Cdash1) * Math.sin(Δh * d2r$1 / 2); // calculate mean Lightness and Chroma

  let Ldash = (L1 + L2) / 2;
  let Cdash = (Cdash1 + Cdash2) / 2;
  let Cdash7 = Math.pow(Cdash, 7); // Compensate for non-linearity in the blue region of Lab.
  // Four possibilities for hue weighting factor,
  // depending on the angles, to get the correct sign

  let hdash;

  if (Cdash1 * Cdash2 === 0) {
    hdash = hsum; // which should be zero
  } else if (habs <= 180) {
    hdash = hsum / 2;
  } else if (hsum < 360) {
    hdash = (hsum + 360) / 2;
  } else {
    hdash = (hsum - 360) / 2;
  } // positional corrections to the lack of uniformity of CIELAB
  // These are all trying to make JND ellipsoids more like spheres
  // SL Lightness crispening factor
  // a background with L=50 is assumed


  let lsq = (Ldash - 50) ** 2;
  let SL = 1 + 0.015 * lsq / Math.sqrt(20 + lsq); // SC Chroma factor, similar to those in CMC and deltaE 94 formulae

  let SC = 1 + 0.045 * Cdash; // Cross term T for blue non-linearity

  let T = 1;
  T -= 0.17 * Math.cos((hdash - 30) * d2r$1);
  T += 0.24 * Math.cos(2 * hdash * d2r$1);
  T += 0.32 * Math.cos((3 * hdash + 6) * d2r$1);
  T -= 0.20 * Math.cos((4 * hdash - 63) * d2r$1); // SH Hue factor depends on Chroma,
  // as well as adjusted hue angle like deltaE94.

  let SH = 1 + 0.015 * Cdash * T; // RT Hue rotation term compensates for rotation of JND ellipses
  // and Munsell constant hue lines
  // in the medium-high Chroma blue region
  // (Hue 225 to 315)

  let Δθ = 30 * Math.exp(-1 * ((hdash - 275) / 25) ** 2);
  let RC = 2 * Math.sqrt(Cdash7 / (Cdash7 + Gfactor));
  let RT = -1 * Math.sin(2 * Δθ * d2r$1) * RC; // Finally calculate the deltaE, term by term as root sume of squares

  let dE = (ΔL / (kL * SL)) ** 2;
  dE += (ΔC / (kC * SC)) ** 2;
  dE += (ΔH / (kH * SH)) ** 2;
  dE += RT * (ΔC / (kC * SC)) * (ΔH / (kH * SH));
  return Math.sqrt(dE); // Yay!!!
}

const ε$2 = .000075;
/**
 * Check if a color is in gamut of either its own or another color space
 * @return {Boolean} Is the color in gamut?
 */

function inGamut(color) {
  let space = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : color.space;
  let {
    epsilon = ε$2
  } = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
  color = getColor(color);
  space = ColorSpace.get(space);
  let coords = color.coords;

  if (space !== color.space) {
    coords = space.from(color);
  }

  return space.inGamut(coords, {
    epsilon
  });
}

function clone(color) {
  return {
    space: color.space,
    coords: color.coords.slice(),
    alpha: color.alpha
  };
}

/**
 * Force coordinates to be in gamut of a certain color space.
 * Mutates the color it is passed.
 * @param {Object} options
 * @param {string} options.method - How to force into gamut.
 *        If "clip", coordinates are just clipped to their reference range.
 *        If in the form [colorSpaceId].[coordName], that coordinate is reduced
 *        until the color is in gamut. Please note that this may produce nonsensical
 *        results for certain coordinates (e.g. hue) or infinite loops if reducing the coordinate never brings the color in gamut.
 * @param {ColorSpace|string} options.space - The space whose gamut we want to map to
 */

function toGamut(color) {
  let {
    method = defaults.gamut_mapping,
    space = color.space
  } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

  if (isString(arguments[1])) {
    space = arguments[1];
  }

  space = ColorSpace.get(space);

  if (inGamut(color, space, {
    epsilon: 0
  })) {
    return color;
  } // 3 spaces:
  // color.space: current color space
  // space: space whose gamut we are mapping to
  // mapSpace: space with the coord we're reducing


  let spaceColor = to(color, space);

  if (method !== "clip" && !inGamut(color, space)) {
    let clipped = toGamut(clone(spaceColor), {
      method: "clip",
      space
    });

    if (deltaE2000(color, clipped) > 2) {
      // Reduce a coordinate of a certain color space until the color is in gamut
      let coordMeta = ColorSpace.resolveCoord(method);
      let mapSpace = coordMeta.space;
      let coordId = coordMeta.id;
      let mappedColor = to(spaceColor, mapSpace);
      let bounds = coordMeta.range || coordMeta.refRange;
      let min = bounds[0];
      let ε = .01; // for deltaE

      let low = min;
      let high = get(mappedColor, coordId);

      while (high - low > ε) {
        let clipped = clone(mappedColor);
        clipped = toGamut(clipped, {
          space,
          method: "clip"
        });
        let deltaE = deltaE2000(mappedColor, clipped);

        if (deltaE - 2 < ε) {
          low = get(mappedColor, coordId);
        } else {
          high = get(mappedColor, coordId);
        }

        set$1(mappedColor, coordId, (low + high) / 2);
      }

      spaceColor = to(mappedColor, space);
    } else {
      spaceColor = clipped;
    }
  }

  if (method === "clip" // Dumb coord clipping
  // finish off smarter gamut mapping with clip to get rid of ε, see #17
  || !inGamut(spaceColor, space, {
    epsilon: 0
  })) {
    let bounds = Object.values(space.coords).map(c => c.range || []);
    spaceColor.coords = spaceColor.coords.map((c, i) => {
      let [min, max] = bounds[i];

      if (min !== undefined) {
        c = Math.max(min, c);
      }

      if (max !== undefined) {
        c = Math.min(c, max);
      }

      return c;
    });
  }

  if (space !== color.space) {
    spaceColor = to(spaceColor, color.space);
  }

  color.coords = spaceColor.coords;
  return color;
}
toGamut.returns = "color";

/**
 * Convert to color space and return a new color
 * @param {Object|string} space - Color space object or id
 * @param {Object} options
 * @param {boolean} options.inGamut - Whether to force resulting color in gamut
 * @returns {Color}
 */

function to(color, space) {
  let {
    inGamut
  } = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
  color = getColor(color);
  space = ColorSpace.get(space);
  let coords = space.from(color);
  let ret = {
    space,
    coords,
    alpha: color.alpha
  };

  if (inGamut) {
    ret = toGamut(ret);
  }

  return ret;
}
to.returns = "color";

var tryToString = tryToString$2;

var $TypeError = TypeError;

var deletePropertyOrThrow$1 = function (O, P) {
  if (!delete O[P]) throw $TypeError('Cannot delete property ' + tryToString(P) + ' of ' + tryToString(O));
};

var $ = _export;
var toObject = toObject$3;
var lengthOfArrayLike = lengthOfArrayLike$3;
var setArrayLength = arraySetLength;
var deletePropertyOrThrow = deletePropertyOrThrow$1;
var doesNotExceedSafeInteger = doesNotExceedSafeInteger$2;

// IE8-
var INCORRECT_RESULT = [].unshift(0) !== 1;

// V8 ~ Chrome < 71 and Safari <= 15.4, FF < 23 throws InternalError
var SILENT_ON_NON_WRITABLE_LENGTH = !function () {
  try {
    // eslint-disable-next-line es/no-object-defineproperty -- safe
    Object.defineProperty([], 'length', { writable: false }).unshift();
  } catch (error) {
    return error instanceof TypeError;
  }
}();

// `Array.prototype.unshift` method
// https://tc39.es/ecma262/#sec-array.prototype.unshift
$({ target: 'Array', proto: true, arity: 1, forced: INCORRECT_RESULT || SILENT_ON_NON_WRITABLE_LENGTH }, {
  // eslint-disable-next-line no-unused-vars -- required for `.length`
  unshift: function unshift(item) {
    var O = toObject(this);
    var len = lengthOfArrayLike(O);
    var argCount = arguments.length;
    if (argCount) {
      doesNotExceedSafeInteger(len + argCount);
      var k = len;
      while (k--) {
        var to = k + argCount;
        if (k in O) O[to] = O[k];
        else deletePropertyOrThrow(O, to);
      }
      for (var j = 0; j < argCount; j++) {
        O[j] = arguments[j];
      }
    } return setArrayLength(O, len + argCount);
  }
});

/**
 * Generic toString() method, outputs a color(spaceId ...coords) function, a functional syntax, or custom formats defined by the color space
 * @param {Object} options
 * @param {number} options.precision - Significant digits
 * @param {boolean} options.inGamut - Adjust coordinates to fit in gamut first? [default: false]
 */

function serialize(color) {
  var _ref, _color$space$getForma;

  let {
    precision = defaults.precision,
    format = "default",
    inGamut: inGamut$1 = true,
    ...customOptions
  } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
  let ret;
  color = getColor(color);
  let formatId = format;
  format = (_ref = (_color$space$getForma = color.space.getFormat(format)) !== null && _color$space$getForma !== void 0 ? _color$space$getForma : color.space.getFormat("default")) !== null && _ref !== void 0 ? _ref : ColorSpace.DEFAULT_FORMAT;
  inGamut$1 || (inGamut$1 = format.toGamut);
  let coords = color.coords; // Convert NaN to zeros to have a chance at a valid CSS color
  // Also convert -0 to 0
  // This also clones it so we can manipulate it

  coords = coords.map(c => c ? c : 0);

  if (inGamut$1 && !inGamut(color)) {
    coords = toGamut(clone(color), inGamut$1 === true ? undefined : inGamut$1).coords;
  }

  if (format.type === "custom") {
    customOptions.precision = precision;

    if (format.serialize) {
      ret = format.serialize(coords, color.alpha, customOptions);
    } else {
      throw new TypeError(`format ${formatId} can only be used to parse colors, not for serialization`);
    }
  } else {
    // Functional syntax
    let name = format.name || "color";

    if (format.serializeCoords) {
      coords = format.serializeCoords(coords, precision);
    } else {
      if (precision !== null) {
        coords = coords.map(c => toPrecision(c, precision));
      }
    }

    let args = [...coords];

    if (name === "color") {
      var _format$ids;

      // If output is a color() function, add colorspace id as first argument
      let cssId = format.id || ((_format$ids = format.ids) === null || _format$ids === void 0 ? void 0 : _format$ids[0]) || color.space.id;
      args.unshift(cssId);
    }

    let alpha = color.alpha;

    if (precision !== null) {
      alpha = toPrecision(alpha, precision);
    }

    let strAlpha = color.alpha < 1 ? ` ${format.commas ? "," : "/"} ${alpha}` : "";
    ret = `${name}(${args.join(format.commas ? ", " : " ")}${strAlpha})`;
  }

  return ret;
}

// using  D65 (no chromatic adaptation)
// http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html
// 0 is actually calculated as  4.994106574466076e-17

const toXYZ_M$5 = [[0.6369580483012914, 0.14461690358620832, 0.1688809751641721], [0.2627002120112671, 0.6779980715188708, 0.05930171646986196], [0.000000000000000, 0.028072693049087428, 1.060985057710791]]; // from ITU-R BT.2124-0 Annex 2 p.3

const fromXYZ_M$5 = [[1.716651187971268, -0.355670783776392, -0.253366281373660], [-0.666684351832489, 1.616481236634939, 0.0157685458139111], [0.017639857445311, -0.042770613257809, 0.942103121235474]];
var REC2020Linear = new RGBColorSpace({
  id: "rec2020-linear",
  name: "Linear REC.2020",
  white: "D65",
  toXYZ_M: toXYZ_M$5,
  fromXYZ_M: fromXYZ_M$5
});

const α = 1.09929682680944;
const β = 0.018053968510807;
var REC2020 = new RGBColorSpace({
  id: "rec2020",
  name: "REC.2020",
  base: REC2020Linear,

  // Non-linear transfer function from Rec. ITU-R BT.2020-2 table 4
  toBase(RGB) {
    return RGB.map(function (val) {
      if (val < β * 4.5) {
        return val / 4.5;
      }

      return Math.pow((val + α - 1) / α, 1 / 0.45);
    });
  },

  fromBase(RGB) {
    return RGB.map(function (val) {
      if (val >= β) {
        return α * Math.pow(val, 0.45) - (α - 1);
      }

      return 4.5 * val;
    });
  },

  formats: {
    color: {}
  }
});

const toXYZ_M$4 = [[0.4865709486482162, 0.26566769316909306, 0.1982172852343625], [0.2289745640697488, 0.6917385218365064, 0.079286914093745], [0.0000000000000000, 0.04511338185890264, 1.043944368900976]];
const fromXYZ_M$4 = [[2.493496911941425, -0.9313836179191239, -0.40271078445071684], [-0.8294889695615747, 1.7626640603183463, 0.023624685841943577], [0.03584583024378447, -0.07617238926804182, 0.9568845240076872]];
var P3Linear = new RGBColorSpace({
  id: "p3-linear",
  name: "Linear P3",
  white: "D65",
  toXYZ_M: toXYZ_M$4,
  fromXYZ_M: fromXYZ_M$4
});

// as used for example in SVG filters
// or in Canvas
// This matrix was calculated directly from the RGB and white chromaticities
// when rounded to 8 decimal places, it agrees completely with the official matrix
// see https://github.com/w3c/csswg-drafts/issues/5922

const toXYZ_M$3 = [[0.41239079926595934, 0.357584339383878, 0.1804807884018343], [0.21263900587151027, 0.715168678767756, 0.07219231536073371], [0.01933081871559182, 0.11919477979462598, 0.9505321522496607]]; // This matrix is the inverse of the above;
// again it agrees with the official definition when rounded to 8 decimal places

const fromXYZ_M$3 = [[3.2409699419045226, -1.537383177570094, -0.4986107602930034], [-0.9692436362808796, 1.8759675015077202, 0.04155505740717559], [0.05563007969699366, -0.20397695888897652, 1.0569715142428786]];
var sRGBLinear = new RGBColorSpace({
  id: "srgb-linear",
  name: "Linear sRGB",
  white: "D65",
  toXYZ_M: toXYZ_M$3,
  fromXYZ_M: fromXYZ_M$3,
  formats: {
    color: {}
  }
});

/* List of CSS color keywords
 * Note that this does not include currentColor, transparent,
 * or system colors
 */
// To produce: Visit https://www.w3.org/TR/css-color-4/#named-colors
// and run in the console:
// copy($$("tr", $(".named-color-table tbody")).map(tr => `"${tr.cells[2].textContent.trim()}": [${tr.cells[4].textContent.trim().split(/\s+/).map(c => c === "0"? "0" : c === "255"? "1" : c + " / 255").join(", ")}]`).join(",\n"))
var KEYWORDS = {
  "aliceblue": [240 / 255, 248 / 255, 1],
  "antiquewhite": [250 / 255, 235 / 255, 215 / 255],
  "aqua": [0, 1, 1],
  "aquamarine": [127 / 255, 1, 212 / 255],
  "azure": [240 / 255, 1, 1],
  "beige": [245 / 255, 245 / 255, 220 / 255],
  "bisque": [1, 228 / 255, 196 / 255],
  "black": [0, 0, 0],
  "blanchedalmond": [1, 235 / 255, 205 / 255],
  "blue": [0, 0, 1],
  "blueviolet": [138 / 255, 43 / 255, 226 / 255],
  "brown": [165 / 255, 42 / 255, 42 / 255],
  "burlywood": [222 / 255, 184 / 255, 135 / 255],
  "cadetblue": [95 / 255, 158 / 255, 160 / 255],
  "chartreuse": [127 / 255, 1, 0],
  "chocolate": [210 / 255, 105 / 255, 30 / 255],
  "coral": [1, 127 / 255, 80 / 255],
  "cornflowerblue": [100 / 255, 149 / 255, 237 / 255],
  "cornsilk": [1, 248 / 255, 220 / 255],
  "crimson": [220 / 255, 20 / 255, 60 / 255],
  "cyan": [0, 1, 1],
  "darkblue": [0, 0, 139 / 255],
  "darkcyan": [0, 139 / 255, 139 / 255],
  "darkgoldenrod": [184 / 255, 134 / 255, 11 / 255],
  "darkgray": [169 / 255, 169 / 255, 169 / 255],
  "darkgreen": [0, 100 / 255, 0],
  "darkgrey": [169 / 255, 169 / 255, 169 / 255],
  "darkkhaki": [189 / 255, 183 / 255, 107 / 255],
  "darkmagenta": [139 / 255, 0, 139 / 255],
  "darkolivegreen": [85 / 255, 107 / 255, 47 / 255],
  "darkorange": [1, 140 / 255, 0],
  "darkorchid": [153 / 255, 50 / 255, 204 / 255],
  "darkred": [139 / 255, 0, 0],
  "darksalmon": [233 / 255, 150 / 255, 122 / 255],
  "darkseagreen": [143 / 255, 188 / 255, 143 / 255],
  "darkslateblue": [72 / 255, 61 / 255, 139 / 255],
  "darkslategray": [47 / 255, 79 / 255, 79 / 255],
  "darkslategrey": [47 / 255, 79 / 255, 79 / 255],
  "darkturquoise": [0, 206 / 255, 209 / 255],
  "darkviolet": [148 / 255, 0, 211 / 255],
  "deeppink": [1, 20 / 255, 147 / 255],
  "deepskyblue": [0, 191 / 255, 1],
  "dimgray": [105 / 255, 105 / 255, 105 / 255],
  "dimgrey": [105 / 255, 105 / 255, 105 / 255],
  "dodgerblue": [30 / 255, 144 / 255, 1],
  "firebrick": [178 / 255, 34 / 255, 34 / 255],
  "floralwhite": [1, 250 / 255, 240 / 255],
  "forestgreen": [34 / 255, 139 / 255, 34 / 255],
  "fuchsia": [1, 0, 1],
  "gainsboro": [220 / 255, 220 / 255, 220 / 255],
  "ghostwhite": [248 / 255, 248 / 255, 1],
  "gold": [1, 215 / 255, 0],
  "goldenrod": [218 / 255, 165 / 255, 32 / 255],
  "gray": [128 / 255, 128 / 255, 128 / 255],
  "green": [0, 128 / 255, 0],
  "greenyellow": [173 / 255, 1, 47 / 255],
  "grey": [128 / 255, 128 / 255, 128 / 255],
  "honeydew": [240 / 255, 1, 240 / 255],
  "hotpink": [1, 105 / 255, 180 / 255],
  "indianred": [205 / 255, 92 / 255, 92 / 255],
  "indigo": [75 / 255, 0, 130 / 255],
  "ivory": [1, 1, 240 / 255],
  "khaki": [240 / 255, 230 / 255, 140 / 255],
  "lavender": [230 / 255, 230 / 255, 250 / 255],
  "lavenderblush": [1, 240 / 255, 245 / 255],
  "lawngreen": [124 / 255, 252 / 255, 0],
  "lemonchiffon": [1, 250 / 255, 205 / 255],
  "lightblue": [173 / 255, 216 / 255, 230 / 255],
  "lightcoral": [240 / 255, 128 / 255, 128 / 255],
  "lightcyan": [224 / 255, 1, 1],
  "lightgoldenrodyellow": [250 / 255, 250 / 255, 210 / 255],
  "lightgray": [211 / 255, 211 / 255, 211 / 255],
  "lightgreen": [144 / 255, 238 / 255, 144 / 255],
  "lightgrey": [211 / 255, 211 / 255, 211 / 255],
  "lightpink": [1, 182 / 255, 193 / 255],
  "lightsalmon": [1, 160 / 255, 122 / 255],
  "lightseagreen": [32 / 255, 178 / 255, 170 / 255],
  "lightskyblue": [135 / 255, 206 / 255, 250 / 255],
  "lightslategray": [119 / 255, 136 / 255, 153 / 255],
  "lightslategrey": [119 / 255, 136 / 255, 153 / 255],
  "lightsteelblue": [176 / 255, 196 / 255, 222 / 255],
  "lightyellow": [1, 1, 224 / 255],
  "lime": [0, 1, 0],
  "limegreen": [50 / 255, 205 / 255, 50 / 255],
  "linen": [250 / 255, 240 / 255, 230 / 255],
  "magenta": [1, 0, 1],
  "maroon": [128 / 255, 0, 0],
  "mediumaquamarine": [102 / 255, 205 / 255, 170 / 255],
  "mediumblue": [0, 0, 205 / 255],
  "mediumorchid": [186 / 255, 85 / 255, 211 / 255],
  "mediumpurple": [147 / 255, 112 / 255, 219 / 255],
  "mediumseagreen": [60 / 255, 179 / 255, 113 / 255],
  "mediumslateblue": [123 / 255, 104 / 255, 238 / 255],
  "mediumspringgreen": [0, 250 / 255, 154 / 255],
  "mediumturquoise": [72 / 255, 209 / 255, 204 / 255],
  "mediumvioletred": [199 / 255, 21 / 255, 133 / 255],
  "midnightblue": [25 / 255, 25 / 255, 112 / 255],
  "mintcream": [245 / 255, 1, 250 / 255],
  "mistyrose": [1, 228 / 255, 225 / 255],
  "moccasin": [1, 228 / 255, 181 / 255],
  "navajowhite": [1, 222 / 255, 173 / 255],
  "navy": [0, 0, 128 / 255],
  "oldlace": [253 / 255, 245 / 255, 230 / 255],
  "olive": [128 / 255, 128 / 255, 0],
  "olivedrab": [107 / 255, 142 / 255, 35 / 255],
  "orange": [1, 165 / 255, 0],
  "orangered": [1, 69 / 255, 0],
  "orchid": [218 / 255, 112 / 255, 214 / 255],
  "palegoldenrod": [238 / 255, 232 / 255, 170 / 255],
  "palegreen": [152 / 255, 251 / 255, 152 / 255],
  "paleturquoise": [175 / 255, 238 / 255, 238 / 255],
  "palevioletred": [219 / 255, 112 / 255, 147 / 255],
  "papayawhip": [1, 239 / 255, 213 / 255],
  "peachpuff": [1, 218 / 255, 185 / 255],
  "peru": [205 / 255, 133 / 255, 63 / 255],
  "pink": [1, 192 / 255, 203 / 255],
  "plum": [221 / 255, 160 / 255, 221 / 255],
  "powderblue": [176 / 255, 224 / 255, 230 / 255],
  "purple": [128 / 255, 0, 128 / 255],
  "rebeccapurple": [102 / 255, 51 / 255, 153 / 255],
  "red": [1, 0, 0],
  "rosybrown": [188 / 255, 143 / 255, 143 / 255],
  "royalblue": [65 / 255, 105 / 255, 225 / 255],
  "saddlebrown": [139 / 255, 69 / 255, 19 / 255],
  "salmon": [250 / 255, 128 / 255, 114 / 255],
  "sandybrown": [244 / 255, 164 / 255, 96 / 255],
  "seagreen": [46 / 255, 139 / 255, 87 / 255],
  "seashell": [1, 245 / 255, 238 / 255],
  "sienna": [160 / 255, 82 / 255, 45 / 255],
  "silver": [192 / 255, 192 / 255, 192 / 255],
  "skyblue": [135 / 255, 206 / 255, 235 / 255],
  "slateblue": [106 / 255, 90 / 255, 205 / 255],
  "slategray": [112 / 255, 128 / 255, 144 / 255],
  "slategrey": [112 / 255, 128 / 255, 144 / 255],
  "snow": [1, 250 / 255, 250 / 255],
  "springgreen": [0, 1, 127 / 255],
  "steelblue": [70 / 255, 130 / 255, 180 / 255],
  "tan": [210 / 255, 180 / 255, 140 / 255],
  "teal": [0, 128 / 255, 128 / 255],
  "thistle": [216 / 255, 191 / 255, 216 / 255],
  "tomato": [1, 99 / 255, 71 / 255],
  "turquoise": [64 / 255, 224 / 255, 208 / 255],
  "violet": [238 / 255, 130 / 255, 238 / 255],
  "wheat": [245 / 255, 222 / 255, 179 / 255],
  "white": [1, 1, 1],
  "whitesmoke": [245 / 255, 245 / 255, 245 / 255],
  "yellow": [1, 1, 0],
  "yellowgreen": [154 / 255, 205 / 255, 50 / 255]
};

let coordGrammar = Array(3).fill("<percentage> | <number>[0, 255]");
var sRGB = new RGBColorSpace({
  id: "srgb",
  name: "sRGB",
  base: sRGBLinear,
  fromBase: rgb => {
    // convert an array of linear-light sRGB values in the range 0.0-1.0
    // to gamma corrected form
    // https://en.wikipedia.org/wiki/SRGB
    return rgb.map(val => {
      let sign = val < 0 ? -1 : 1;
      let abs = val * sign;

      if (abs > 0.0031308) {
        return sign * (1.055 * abs ** (1 / 2.4) - 0.055);
      }

      return 12.92 * val;
    });
  },
  toBase: rgb => {
    // convert an array of sRGB values in the range 0.0 - 1.0
    // to linear light (un-companded) form.
    // https://en.wikipedia.org/wiki/SRGB
    return rgb.map(val => {
      let sign = val < 0 ? -1 : 1;
      let abs = val * sign;

      if (abs < 0.04045) {
        return val / 12.92;
      }

      return sign * ((abs + 0.055) / 1.055) ** 2.4;
    });
  },
  formats: {
    "rgb": {
      coords: coordGrammar
    },
    "color": {
      /* use defaults */
    },
    "rgba": {
      coords: coordGrammar,
      commas: true,
      lastAlpha: true
    },
    "hex": {
      type: "custom",
      toGamut: true,
      test: str => /^#([a-f0-9]{3,4}){1,2}$/i.test(str),

      parse(str) {
        if (str.length <= 5) {
          // #rgb or #rgba, duplicate digits
          str = str.replace(/[a-f0-9]/gi, "$&$&");
        }

        let rgba = [];
        str.replace(/[a-f0-9]{2}/gi, component => {
          rgba.push(parseInt(component, 16) / 255);
        });
        return {
          spaceId: "srgb",
          coords: rgba.slice(0, 3),
          alpha: rgba.slice(3)[0]
        };
      },

      serialize: function (coords, alpha) {
        let {
          collapse = true // collapse to 3-4 digit hex when possible?

        } = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};

        if (alpha < 1) {
          coords.push(alpha);
        }

        coords = coords.map(c => Math.round(c * 255));
        let collapsible = collapse && coords.every(c => c % 17 === 0);
        let hex = coords.map(c => {
          if (collapsible) {
            return (c / 17).toString(16);
          }

          return c.toString(16).padStart(2, "0");
        }).join("");
        return "#" + hex;
      }
    },
    "keyword": {
      type: "custom",
      test: str => /^[a-z]+$/i.test(str),

      parse(str) {
        str = str.toLowerCase();
        let ret = {
          spaceId: "srgb",
          coords: null,
          alpha: 1
        };

        if (str === "transparent") {
          ret.coords = KEYWORDS.black;
          ret.alpha = 0;
        } else {
          ret.coords = KEYWORDS[str];
        }

        if (ret.coords) {
          return ret;
        }
      }

    }
  }
});

var P3 = new RGBColorSpace({
  id: "p3",
  name: "P3",
  base: P3Linear,
  // Gamma encoding/decoding is the same as sRGB
  fromBase: sRGB.fromBase,
  toBase: sRGB.toBase,
  formats: {
    color: {
      id: "display-p3"
    }
  }
});

defaults.display_space = sRGB;

if (typeof CSS !== "undefined" && CSS.supports) {
  // Find widest supported color space for CSS
  for (let space of [lab, REC2020, P3]) {
    let coords = space.getMinCoords();
    let color = {
      space,
      coords,
      alpha: 1
    };
    let str = serialize(color);

    if (CSS.supports("color", str)) {
      defaults.display_space = space;
      break;
    }
  }
}
/**
 * Returns a serialization of the color that can actually be displayed in the browser.
 * If the default serialization can be displayed, it is returned.
 * Otherwise, the color is converted to Lab, REC2020, or P3, whichever is the widest supported.
 * In Node.js, this is basically equivalent to `serialize()` but returns a `String` object instead.
 *
 * @export
 * @param {{space, coords} | Color | string} color
 * @param {*} [options={}] Options to be passed to serialize()
 * @param {ColorSpace | string} [options.space = defaults.display_space] Color space to use for serialization if default is not supported
 * @returns {String} String object containing the serialized color with a color property containing the converted color (or the original, if no conversion was necessary)
 */


function display(color) {
  let {
    space = defaults.display_space,
    ...options
  } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
  let ret = serialize(color, options);

  if (typeof CSS === "undefined" || CSS.supports("color", ret) || !defaults.display_space) {
    ret = new String(ret);
    ret.color = color;
  } else {
    // If we're here, what we were about to output is not supported
    // Fall back to fallback space
    let fallbackColor = to(color, space);
    ret = new String(serialize(fallbackColor, options));
    ret.color = fallbackColor;
  }

  return ret;
}

/**
 * Euclidean distance of colors in an arbitrary color space
 */

function distance(color1, color2) {
  let space = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : "lab";
  space = ColorSpace.get(space);
  let coords1 = space.from(color1);
  let coords2 = space.from(color2);
  return Math.sqrt(coords1.reduce((acc, c1, i) => {
    let c2 = coords2[i];

    if (isNaN(c1) || isNaN(c2)) {
      return acc;
    }

    return acc + (c2 - c1) ** 2;
  }, 0));
}

function equals(color1, color2) {
  color1 = getColor(color1);
  color2 = getColor(color2);
  return color1.space === color2.space && color1.alpha === color2.alpha && color1.coords.every((c, i) => c === color2.coords[i]);
}

/**
 * Relative luminance
 */
function getLuminance(color) {
  return get(color, [XYZ_D65, "y"]);
}
function setLuminance(color) {
  set(color, [XYZ_D65, "y"], value);
}
function register$2(Color) {
  Object.defineProperty(Color.prototype, "luminance", {
    get() {
      return getLuminance(this);
    },

    set(value) {
      setLuminance(this);
    }

  });
}

var luminance = /*#__PURE__*/Object.freeze({
  __proto__: null,
  getLuminance: getLuminance,
  setLuminance: setLuminance,
  register: register$2
});

// WCAG 2.0 contrast https://www.w3.org/TR/WCAG20-TECHS/G18.html
function contrastWCAG21(color1, color2) {
  color1 = getColor(color1);
  color2 = getColor(color2);
  let Y1 = Math.max(getLuminance(color1), 0);
  let Y2 = Math.max(getLuminance(color2), 0);

  if (Y2 > Y1) {
    [Y1, Y2] = [Y2, Y1];
  }

  return (Y1 + .05) / (Y2 + .05);
}

// APCA 0.0.98G

const normBG = 0.56;
const normTXT = 0.57;
const revTXT = 0.62;
const revBG = 0.65; // clamps

const blkThrs = 0.022;
const blkClmp = 1.414;
const loClip = 0.1;
const deltaYmin = 0.0005; // scalers
// see https://github.com/w3c/silver/issues/645

const scaleBoW = 1.14;
const loBoWoffset = 0.027;
const scaleWoB = 1.14;

function fclamp(Y) {
  if (Y >= blkThrs) return Y;
  return Y + (blkThrs - Y) ** blkClmp;
}

function linearize(val) {
  let sign = val < 0 ? -1 : 1;
  let abs = Math.abs(val);
  return sign * Math.pow(abs, 2.4);
} // Not symmetric, requires a foreground (text) color, and a background color


function contrastAPCA(background, foreground) {
  foreground = getColor(foreground);
  background = getColor(background);
  let S;
  let C;
  let Sapc; // Myndex as-published, assumes sRGB inputs

  let R, G, B;
  foreground = to(foreground, 'srgb'); // Should these be clamped to in-gamut values?
  // Calculates "screen luminance" with non-standard simple gamma EOTF
  // weights should be from CSS Color 4, not the ones here which are via Myndex and copied from Lindbloom

  [R, G, B] = foreground.coords;
  let lumTxt = linearize(R) * 0.2126729 + linearize(G) * 0.7151522 + linearize(B) * 0.0721750;
  background = to(background, 'srgb');
  [R, G, B] = background.coords;
  let lumBg = linearize(R) * 0.2126729 + linearize(G) * 0.7151522 + linearize(B) * 0.0721750; // toe clamping of very dark values to account for flare

  let Ytxt = fclamp(lumTxt);
  let Ybg = fclamp(lumBg); // are we "Black on White" (dark on light), or light on dark?

  let BoW = Ybg > Ytxt; // why is this a delta, when Y is not perceptually uniform?
  // Answer: it is a noise gate, see
  // https://github.com/LeaVerou/color.js/issues/208

  if (Math.abs(Ybg - Ytxt) < deltaYmin) {
    C = 0;
  } else {
    if (BoW) {
      // dark text on light background
      S = Ybg ** normBG - Ytxt ** normTXT;
      C = S * scaleBoW;
    } else {
      // light text on dark background
      S = Ybg ** revBG - Ytxt ** revTXT;
      C = S * scaleWoB;
    }
  }

  if (Math.abs(C) < loClip) {
    Sapc = 0;
  } else if (C > 0) {
    // not clear whether Woffset is loBoWoffset or loWoBoffset
    // but they have the same value
    Sapc = C - loBoWoffset;
  } else {
    Sapc = C + loBoWoffset;
  }

  return Sapc * 100;
}

// Michelson  luminance contrast
function contrastMichelson(color1, color2) {
  color1 = getColor(color1);
  color2 = getColor(color2);
  let Y1 = Math.max(getLuminance(color1), 0);
  let Y2 = Math.max(getLuminance(color2), 0);

  if (Y2 > Y1) {
    [Y1, Y2] = [Y2, Y1];
  }

  let denom = Y1 + Y2;
  return denom === 0 ? 0 : (Y1 - Y2) / denom;
}

// Weber luminance contrast
// a plain Weber contrast of ~45647.
// So, setting the divide-by-zero result at 50000 is a reasonable
// max clamp for the plain Weber

const max = 50000;
function contrastWeber(color1, color2) {
  color1 = getColor(color1);
  color2 = getColor(color2);
  let Y1 = Math.max(getLuminance(color1), 0);
  let Y2 = Math.max(getLuminance(color2), 0);

  if (Y2 > Y1) {
    [Y1, Y2] = [Y2, Y1];
  }

  return Y2 === 0 ? max : (Y1 - Y2) / Y2;
}

// CIE Lightness difference, as used by Google Material Design
function contrastLstar(color1, color2) {
  color1 = getColor(color1);
  color2 = getColor(color2);
  let L1 = get(color1, [lab, "l"]);
  let L2 = get(color2, [lab, "l"]);
  return Math.abs(L1 - L2);
}

const ε$1 = 216 / 24389; // 6^3/29^3 == (24/116)^3

const ε3 = 24 / 116;
const κ = 24389 / 27; // 29^3/3^3

let white = WHITES.D65;
var lab_d65 = new ColorSpace({
  id: "lab-d65",
  name: "Lab D65",
  coords: {
    l: {
      refRange: [0, 100],
      name: "L"
    },
    a: {
      refRange: [-125, 125]
    },
    b: {
      refRange: [-125, 125]
    }
  },
  // Assuming XYZ is relative to D65, convert to CIE Lab
  // from CIE standard, which now defines these as a rational fraction
  white,
  base: XYZ_D65,

  // Convert D65-adapted XYZ to Lab
  //  CIE 15.3:2004 section 8.2.1.1
  fromBase(XYZ) {
    // compute xyz, which is XYZ scaled relative to reference white
    let xyz = XYZ.map((value, i) => value / white[i]); // now compute f

    let f = xyz.map(value => value > ε$1 ? Math.cbrt(value) : (κ * value + 16) / 116);
    return [116 * f[1] - 16, // L
    500 * (f[0] - f[1]), // a
    200 * (f[1] - f[2]) // b
    ];
  },

  // Convert Lab to D65-adapted XYZ
  // Same result as CIE 15.3:2004 Appendix D although the derivation is different
  // http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html
  toBase(Lab) {
    // compute f, starting with the luminance-related term
    let f = [];
    f[1] = (Lab[0] + 16) / 116;
    f[0] = Lab[1] / 500 + f[1];
    f[2] = f[1] - Lab[2] / 200; // compute xyz

    let xyz = [f[0] > ε3 ? Math.pow(f[0], 3) : (116 * f[0] - 16) / κ, Lab[0] > 8 ? Math.pow((Lab[0] + 16) / 116, 3) : Lab[0] / κ, f[2] > ε3 ? Math.pow(f[2], 3) : (116 * f[2] - 16) / κ]; // Compute XYZ by scaling xyz by reference white

    return xyz.map((value, i) => value * white[i]);
  },

  formats: {
    "lab-d65": {
      coords: ["<number> | <percentage>", "<number>", "<number>"]
    }
  }
});

// Delta Phi Star perceptual lightness contrast
const phi = Math.pow(5, 0.5) * 0.5 + 0.5; // Math.phi can be used if Math.js

function contrastDeltaPhi(color1, color2) {
  color1 = getColor(color1);
  color2 = getColor(color2);
  let Lstr1 = get(color1, [lab_d65, "l"]);
  let Lstr2 = get(color2, [lab_d65, "l"]);
  let deltaPhiStar = Math.abs(Math.pow(Lstr1, phi) - Math.pow(Lstr2, phi));
  let contrast = Math.pow(deltaPhiStar, 1 / phi) * Math.SQRT2 - 40;
  return contrast < 7.5 ? 0.0 : contrast;
}

var contrastMethods = /*#__PURE__*/Object.freeze({
  __proto__: null,
  contrastWCAG21: contrastWCAG21,
  contrastAPCA: contrastAPCA,
  contrastMichelson: contrastMichelson,
  contrastWeber: contrastWeber,
  contrastLstar: contrastLstar,
  contrastDeltaPhi: contrastDeltaPhi
});

function contrast(background, foreground) {
  let o = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};

  if (isString(o)) {
    o = {
      algorithm: o
    };
  }

  let {
    algorithm,
    ...rest
  } = o;

  if (!algorithm) {
    let algorithms = Object.keys(contrastMethods).map(a => a.replace(/^contrast/, "")).join(", ");
    throw new TypeError(`contrast() function needs a contrast algorithm. Please specify one of: ${algorithms}`);
  }

  background = getColor(background);
  foreground = getColor(foreground);

  for (let a in contrastMethods) {
    if ("contrast" + algorithm.toLowerCase() === a.toLowerCase()) {
      return contrastMethods[a](background, foreground, rest);
    }
  }

  throw new TypeError(`Unknown contrast algorithm: ${algorithm}`);
}

function uv(color) {
  let [X, Y, Z] = getAll(color, XYZ_D65);
  let denom = X + 15 * Y + 3 * Z;
  return [4 * X / denom, 9 * Y / denom];
}
function xy(color) {
  let [X, Y, Z] = getAll(color, XYZ_D65);
  let sum = X + Y + Z;
  return [X / sum, Y / sum];
}
function register$1(Color) {
  // no setters, as lightness information is lost
  // when converting color to chromaticity
  Object.defineProperty(Color.prototype, "uv", {
    get() {
      return uv(this);
    }

  });
  Object.defineProperty(Color.prototype, "xy", {
    get() {
      return xy(this);
    }

  });
}

var chromaticity = /*#__PURE__*/Object.freeze({
  __proto__: null,
  uv: uv,
  xy: xy,
  register: register$1
});

function deltaE76(color, sample) {
  return distance(color, sample, "lab");
}

// than the simple 1976 Euclidean distance in Lab
// CMC by the Color Measurement Committee of the
// Bradford Society of Dyeists and Colorsts, 1994.
// Uses LCH rather than Lab,
// with different weights for L, C and H differences
// A nice increase in accuracy for modest increase in complexity

const π = Math.PI;
const d2r = π / 180;
function deltaECMC (color, sample) {
  let {
    l = 2,
    c = 1
  } = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
  // Given this color as the reference
  // and a sample,
  // calculate deltaE CMC.
  // This implementation assumes the parametric
  // weighting factors l:c are 2:1
  // which is typical for non-textile uses.
  let [L1, a1, b1] = lab.from(color);
  let [, C1, H1] = lch.from(lab, [L1, a1, b1]);
  let [L2, a2, b2] = lab.from(sample);
  let C2 = lch.from(lab, [L2, a2, b2])[1]; // let [L1, a1, b1] = color.getAll(lab);
  // let C1 = color.get("lch.c");
  // let H1 = color.get("lch.h");
  // let [L2, a2, b2] = sample.getAll(lab);
  // let C2 = sample.get("lch.c");
  // Check for negative Chroma,
  // which might happen through
  // direct user input of LCH values

  if (C1 < 0) {
    C1 = 0;
  }

  if (C2 < 0) {
    C2 = 0;
  } // we don't need H2 as ΔH is calculated from Δa, Δb and ΔC
  // Lightness and Chroma differences
  // These are (color - sample), unlike deltaE2000


  let ΔL = L1 - L2;
  let ΔC = C1 - C2;
  let Δa = a1 - a2;
  let Δb = b1 - b2; // weighted Hue difference, less for larger Chroma difference

  let H2 = Δa ** 2 + Δb ** 2 - ΔC ** 2; // due to roundoff error it is possible that, for zero a and b,
  // ΔC > Δa + Δb is 0, resulting in attempting
  // to take the square root of a negative number
  // trying instead the equation from Industrial Color Physics
  // By Georg A. Klein
  // let ΔH = ((a1 * b2) - (a2 * b1)) / Math.sqrt(0.5 * ((C2 * C1) + (a2 * a1) + (b2 * b1)));
  // console.log({ΔH});
  // This gives the same result to 12 decimal places
  // except it sometimes NaNs when trying to root a negative number
  // let ΔH = Math.sqrt(H2); we never actually use the root, it gets squared again!!
  // positional corrections to the lack of uniformity of CIELAB
  // These are all trying to make JND ellipsoids more like spheres
  // SL Lightness crispening factor, depends entirely on L1 not L2

  let SL = 0.511; // linear portion of the Y to L transfer function

  if (L1 >= 16) {
    // cubic portion
    SL = 0.040975 * L1 / (1 + 0.01765 * L1);
  } // SC Chroma factor


  let SC = 0.0638 * C1 / (1 + 0.0131 * C1) + 0.638; // Cross term T for blue non-linearity

  let T;

  if (Number.isNaN(H1)) {
    H1 = 0;
  }

  if (H1 >= 164 && H1 <= 345) {
    T = 0.56 + Math.abs(0.2 * Math.cos((H1 + 168) * d2r));
  } else {
    T = 0.36 + Math.abs(0.4 * Math.cos((H1 + 35) * d2r));
  } // console.log({T});
  // SH Hue factor also depends on C1,


  let C4 = Math.pow(C1, 4);
  let F = Math.sqrt(C4 / (C4 + 1900));
  let SH = SC * (F * T + 1 - F); // Finally calculate the deltaE, term by term as root sume of squares

  let dE = (ΔL / (l * SL)) ** 2;
  dE += (ΔC / (c * SC)) ** 2;
  dE += H2 / SH ** 2; // dE += (ΔH / SH)  ** 2;

  return Math.sqrt(dE); // Yay!!!
}

const Yw$1 = 203; // absolute luminance of media white

var XYZ_Abs_D65 = new ColorSpace({
  // Absolute CIE XYZ, with a D65 whitepoint,
  // as used in most HDR colorspaces as a starting point.
  // SDR spaces are converted per BT.2048
  // so that diffuse, media white is 203 cd/m²
  id: "xyz-abs-d65",
  name: "Absolute XYZ D65",
  coords: {
    x: {
      refRange: [0, 9504.7],
      name: "Xa"
    },
    y: {
      refRange: [0, 10000],
      name: "Ya"
    },
    z: {
      refRange: [0, 10888.3],
      name: "Za"
    }
  },
  base: XYZ_D65,

  fromBase(XYZ) {
    // Make XYZ absolute, not relative to media white
    // Maximum luminance in PQ is 10,000 cd/m²
    // Relative XYZ has Y=1 for media white
    return XYZ.map(v => Math.max(v * Yw$1, 0));
  },

  toBase(AbsXYZ) {
    // Convert to media-white relative XYZ
    return AbsXYZ.map(v => Math.max(v / Yw$1, 0));
  }

});

const b$1 = 1.15;
const g = 0.66;
const n$1 = 2610 / 2 ** 14;
const ninv$1 = 2 ** 14 / 2610;
const c1$2 = 3424 / 2 ** 12;
const c2$2 = 2413 / 2 ** 7;
const c3$2 = 2392 / 2 ** 7;
const p = 1.7 * 2523 / 2 ** 5;
const pinv = 2 ** 5 / (1.7 * 2523);
const d = -0.56;
const d0 = 1.6295499532821566E-11;
const XYZtoCone_M = [[0.41478972, 0.579999, 0.0146480], [-0.2015100, 1.120649, 0.0531008], [-0.0166008, 0.264800, 0.6684799]]; // XYZtoCone_M inverted

const ConetoXYZ_M = [[1.9242264357876067, -1.0047923125953657, 0.037651404030618], [0.35031676209499907, 0.7264811939316552, -0.06538442294808501], [-0.09098281098284752, -0.3127282905230739, 1.5227665613052603]];
const ConetoIab_M = [[0.5, 0.5, 0], [3.524000, -4.066708, 0.542708], [0.199076, 1.096799, -1.295875]]; // ConetoIab_M inverted

const IabtoCone_M = [[1, 0.1386050432715393, 0.05804731615611886], [0.9999999999999999, -0.1386050432715393, -0.05804731615611886], [0.9999999999999998, -0.09601924202631895, -0.8118918960560388]];
var Jzazbz = new ColorSpace({
  id: "jzazbz",
  name: "Jzazbz",
  coords: {
    jz: {
      refRange: [0, 1],
      name: "Jz"
    },
    az: {
      refRange: [-0.5, 0.5]
    },
    bz: {
      refRange: [-0.5, 0.5]
    }
  },
  base: XYZ_Abs_D65,

  fromBase(XYZ) {
    // First make XYZ absolute, not relative to media white
    // Maximum luminance in PQ is 10,000 cd/m²
    // Relative XYZ has Y=1 for media white
    // BT.2048 says media white Y=203 at PQ 58
    let [Xa, Ya, Za] = XYZ; // modify X and Y

    let Xm = b$1 * Xa - (b$1 - 1) * Za;
    let Ym = g * Ya - (g - 1) * Xa; // move to LMS cone domain

    let LMS = multiplyMatrices(XYZtoCone_M, [Xm, Ym, Za]); // PQ-encode LMS

    let PQLMS = LMS.map(function (val) {
      let num = c1$2 + c2$2 * (val / 10000) ** n$1;
      let denom = 1 + c3$2 * (val / 10000) ** n$1;
      return (num / denom) ** p;
    }); // almost there, calculate Iz az bz

    let [Iz, az, bz] = multiplyMatrices(ConetoIab_M, PQLMS); // console.log({Iz, az, bz});

    let Jz = (1 + d) * Iz / (1 + d * Iz) - d0;
    return [Jz, az, bz];
  },

  toBase(Jzazbz) {
    let [Jz, az, bz] = Jzazbz;
    let Iz = (Jz + d0) / (1 + d - d * (Jz + d0)); // bring into LMS cone domain

    let PQLMS = multiplyMatrices(IabtoCone_M, [Iz, az, bz]); // convert from PQ-coded to linear-light

    let LMS = PQLMS.map(function (val) {
      let num = c1$2 - val ** pinv;
      let denom = c3$2 * val ** pinv - c2$2;
      let x = 10000 * (num / denom) ** ninv$1;
      return x; // luminance relative to diffuse white, [0, 70 or so].
    }); // modified abs XYZ

    let [Xm, Ym, Za] = multiplyMatrices(ConetoXYZ_M, LMS); // restore standard D50 relative XYZ, relative to media white

    let Xa = (Xm + (b$1 - 1) * Za) / b$1;
    let Ya = (Ym + (g - 1) * Xa) / g;
    return [Xa, Ya, Za];
  },

  formats: {
    // https://drafts.csswg.org/css-color-hdr/#Jzazbz
    "color": {}
  }
});

var jzczhz = new ColorSpace({
  id: "jzczhz",
  name: "JzCzHz",
  coords: {
    jz: {
      refRange: [0, 1],
      name: "Jz"
    },
    cz: {
      refRange: [0, 1],
      name: "Chroma"
    },
    hz: {
      refRange: [0, 360],
      type: "angle",
      name: "Hue"
    }
  },
  base: Jzazbz,

  fromBase(jzazbz) {
    // Convert to polar form
    let [Jz, az, bz] = jzazbz;
    let hue;
    const ε = 0.0002; // chromatic components much smaller than a,b

    if (Math.abs(az) < ε && Math.abs(bz) < ε) {
      hue = NaN;
    } else {
      hue = Math.atan2(bz, az) * 180 / Math.PI;
    }

    return [Jz, // Jz is still Jz
    Math.sqrt(az ** 2 + bz ** 2), // Chroma
    constrain(hue) // Hue, in degrees [0 to 360)
    ];
  },

  toBase(jzczhz) {
    // Convert from polar form
    // debugger;
    return [jzczhz[0], // Jz is still Jz
    jzczhz[1] * Math.cos(jzczhz[2] * Math.PI / 180), // az
    jzczhz[1] * Math.sin(jzczhz[2] * Math.PI / 180) // bz
    ];
  },

  formats: {
    color: {}
  }
});

// than the simple 1976 Euclidean distance in Lab
// Uses JzCzHz, which has improved perceptual uniformity
// and thus a simple Euclidean root-sum of ΔL² ΔC² ΔH²
// gives good results.

function deltaEJz (color, sample) {
  // Given this color as the reference
  // and a sample,
  // calculate deltaE in JzCzHz.
  let [Jz1, Cz1, Hz1] = jzczhz.from(color);
  let [Jz2, Cz2, Hz2] = jzczhz.from(sample); // Lightness and Chroma differences
  // sign does not matter as they are squared.

  let ΔJ = Jz1 - Jz2;
  let ΔC = Cz1 - Cz2; // length of chord for ΔH

  if (Number.isNaN(Hz1) && Number.isNaN(Hz2)) {
    // both undefined hues
    Hz1 = 0;
    Hz2 = 0;
  } else if (Number.isNaN(Hz1)) {
    // one undefined, set to the defined hue
    Hz1 = Hz2;
  } else if (Number.isNaN(Hz2)) {
    Hz2 = Hz1;
  }

  let Δh = Hz1 - Hz2;
  let ΔH = 2 * Math.sqrt(Cz1 * Cz2) * Math.sin(Δh / 2 * (Math.PI / 180));
  return Math.sqrt(ΔJ ** 2 + ΔC ** 2 + ΔH ** 2);
}

const c1$1 = 3424 / 4096;
const c2$1 = 2413 / 128;
const c3$1 = 2392 / 128;
const m1 = 2610 / 16384;
const m2 = 2523 / 32;
const im1 = 16384 / 2610;
const im2 = 32 / 2523; // The matrix below includes the 4% crosstalk components
// and is from the Dolby "What is ICtCp" paper"

const XYZtoLMS_M$1 = [[0.3592, 0.6976, -0.0358], [-0.1922, 1.1004, 0.0755], [0.0070, 0.0749, 0.8434]]; // linear-light Rec.2020 to LMS, again with crosstalk
// rational terms from Jan Fröhlich,
// Encoding High Dynamic Range andWide Color Gamut Imagery, p.97
// and ITU-R BT.2124-0 p.2

/*
const Rec2020toLMS_M = [
	[ 1688 / 4096,  2146 / 4096,   262 / 4096 ],
	[  683 / 4096,  2951 / 4096,   462 / 4096 ],
	[   99 / 4096,   309 / 4096,  3688 / 4096 ]
];
*/
// this includes the Ebner LMS coefficients,
// the rotation, and the scaling to [-0.5,0.5] range
// rational terms from Fröhlich p.97
// and ITU-R BT.2124-0 pp.2-3

const LMStoIPT_M = [[2048 / 4096, 2048 / 4096, 0], [6610 / 4096, -13613 / 4096, 7003 / 4096], [17933 / 4096, -17390 / 4096, -543 / 4096]]; // inverted matrices, calculated from the above

const IPTtoLMS_M = [[0.99998889656284013833, 0.00860505014728705821, 0.1110343715986164786], [1.0000111034371598616, -0.00860505014728705821, -0.1110343715986164786], [1.000032063391005412, 0.56004913547279000113, -0.32063391005412026469]];
/*
const LMStoRec2020_M = [
	[ 3.4375568932814012112,   -2.5072112125095058195,   0.069654319228104608382],
	[-0.79142868665644156125,   1.9838372198740089874,  -0.19240853321756742626 ],
	[-0.025646662911506476363, -0.099240248643945566751, 1.1248869115554520431  ]
];
*/

const LMStoXYZ_M$1 = [[2.0701800566956135096, -1.3264568761030210255, 0.20661600684785517081], [0.36498825003265747974, 0.68046736285223514102, -0.045421753075853231409], [-0.049595542238932107896, -0.049421161186757487412, 1.1879959417328034394]]; // Only the PQ form of ICtCp is implemented here. There is also an HLG form.
// from Dolby, "WHAT IS ICTCP?"
// https://professional.dolby.com/siteassets/pdfs/ictcp_dolbywhitepaper_v071.pdf
// and
// Dolby, "Perceptual Color Volume
// Measuring the Distinguishable Colors of HDR and WCG Displays"
// https://professional.dolby.com/siteassets/pdfs/dolby-vision-measuring-perceptual-color-volume-v7.1.pdf

var ictcp = new ColorSpace({
  id: "ictcp",
  name: "ICTCP",
  // From BT.2100-2 page 7:
  // During production, signal values are expected to exceed the
  // range E′ = [0.0 : 1.0]. This provides processing headroom and avoids
  // signal degradation during cascaded processing. Such values of E′,
  // below 0.0 or exceeding 1.0, should not be clipped during production
  // and exchange.
  // Values below 0.0 should not be clipped in reference displays (even
  // though they represent “negative” light) to allow the black level of
  // the signal (LB) to be properly set using test signals known as “PLUGE”
  coords: {
    i: {
      refRange: [0, 1],
      // Constant luminance,
      name: "I"
    },
    ct: {
      refRange: [-0.5, 0.5],
      // Full BT.2020 gamut in range [-0.5, 0.5]
      name: "CT"
    },
    cp: {
      refRange: [-0.5, 0.5],
      name: "CP"
    }
  },
  base: XYZ_Abs_D65,

  fromBase(XYZ) {
    // move to LMS cone domain
    let LMS = multiplyMatrices(XYZtoLMS_M$1, XYZ);
    return LMStoICtCp(LMS);
  },

  toBase(ICtCp) {
    let LMS = ICtCptoLMS(ICtCp);
    return multiplyMatrices(LMStoXYZ_M$1, LMS);
  },

  formats: {
    color: {}
  }
});

function LMStoICtCp(LMS) {
  // apply the PQ EOTF
  // we can't ever be dividing by zero because of the "1 +" in the denominator
  let PQLMS = LMS.map(function (val) {
    let num = c1$1 + c2$1 * (val / 10000) ** m1;
    let denom = 1 + c3$1 * (val / 10000) ** m1;
    return (num / denom) ** m2;
  }); // LMS to IPT, with rotation for Y'C'bC'r compatibility

  return multiplyMatrices(LMStoIPT_M, PQLMS);
}

function ICtCptoLMS(ICtCp) {
  let PQLMS = multiplyMatrices(IPTtoLMS_M, ICtCp); // From BT.2124-0 Annex 2 Conversion 3

  let LMS = PQLMS.map(function (val) {
    let num = Math.max(val ** im2 - c1$1, 0);
    let denom = c2$1 - c3$1 * val ** im2;
    return 10000 * (num / denom) ** im1;
  });
  return LMS;
}

// which the ITU calls Delta E ITP, which is shorter
// formulae from ITU Rec. ITU-R BT.2124-0

function deltaEITP (color, sample) {
  // Given this color as the reference
  // and a sample,
  // calculate deltaE in ICtCp
  // which is simply the Euclidean distance
  let [I1, T1, P1] = ictcp.from(color);
  let [I2, T2, P2] = ictcp.from(sample); // the 0.25 factor is to undo the encoding scaling in Ct
  // the 720 is so that 1 deltaE = 1 JND
  // per  ITU-R BT.2124-0 p.3

  return 720 * Math.sqrt((I1 - I2) ** 2 + 0.25 * (T1 - T2) ** 2 + (P1 - P2) ** 2);
}

// see https://github.com/w3c/csswg-drafts/issues/6642#issuecomment-943521484

const XYZtoLMS_M = [[0.8190224432164319, 0.3619062562801221, -0.12887378261216414], [0.0329836671980271, 0.9292868468965546, 0.03614466816999844], [0.048177199566046255, 0.26423952494422764, 0.6335478258136937]]; // inverse of XYZtoLMS_M

const LMStoXYZ_M = [[1.2268798733741557, -0.5578149965554813, 0.28139105017721583], [-0.04057576262431372, 1.1122868293970594, -0.07171106666151701], [-0.07637294974672142, -0.4214933239627914, 1.5869240244272418]];
const LMStoLab_M = [[0.2104542553, 0.7936177850, -0.0040720468], [1.9779984951, -2.4285922050, 0.4505937099], [0.0259040371, 0.7827717662, -0.8086757660]]; // LMStoIab_M inverted

const LabtoLMS_M = [[0.99999999845051981432, 0.39633779217376785678, 0.21580375806075880339], [1.0000000088817607767, -0.1055613423236563494, -0.063854174771705903402], [1.0000000546724109177, -0.089484182094965759684, -1.2914855378640917399]];
var OKLab = new ColorSpace({
  id: "oklab",
  name: "OKLab",
  coords: {
    l: {
      refRange: [0, 1],
      name: "L"
    },
    a: {
      refRange: [-0.4, 0.4]
    },
    b: {
      refRange: [-0.4, 0.4]
    }
  },
  // Note that XYZ is relative to D65
  white: "D65",
  base: XYZ_D65,

  fromBase(XYZ) {
    // move to LMS cone domain
    let LMS = multiplyMatrices(XYZtoLMS_M, XYZ); // non-linearity

    let LMSg = LMS.map(val => Math.cbrt(val));
    return multiplyMatrices(LMStoLab_M, LMSg);
  },

  toBase(OKLab) {
    // move to LMS cone domain
    let LMSg = multiplyMatrices(LabtoLMS_M, OKLab); // restore linearity

    let LMS = LMSg.map(val => val ** 3);
    return multiplyMatrices(LMStoXYZ_M, LMS);
  },

  formats: {
    "oklab": {
      coords: ["<number> | <percentage>", "<number>", "<number>"]
    }
  }
});

// More accurate color-difference formulae
function deltaEOK (color, sample) {
  // Given this color as the reference
  // and a sample,
  // calculate deltaEOK, term by term as root sum of squares
  let [L1, a1, b1] = OKLab.from(color);
  let [L2, a2, b2] = OKLab.from(sample);
  let ΔL = L1 - L2;
  let Δa = a1 - a2;
  let Δb = b1 - b2;
  return Math.sqrt(ΔL ** 2 + Δa ** 2 + Δb ** 2);
}

var deltaEMethods = /*#__PURE__*/Object.freeze({
  __proto__: null,
  deltaE76: deltaE76,
  deltaECMC: deltaECMC,
  deltaE2000: deltaE2000,
  deltaEJz: deltaEJz,
  deltaEITP: deltaEITP,
  deltaEOK: deltaEOK
});

function deltaE(c1, c2) {
  let o = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};

  if (isString(o)) {
    o = {
      method: o
    };
  }

  let {
    method = defaults.deltaE,
    ...rest
  } = o;
  c1 = getColor(c1);
  c2 = getColor(c2);

  for (let m in deltaEMethods) {
    if ("deltae" + method.toLowerCase() === m.toLowerCase()) {
      return deltaEMethods[m](c1, c2, rest);
    }
  }

  throw new TypeError(`Unknown deltaE method: ${method}`);
}

var deltaE$1 = /*#__PURE__*/Object.freeze({
  __proto__: null,
  'default': deltaE
});

function lighten(color) {
  let amount = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : .25;
  let space = ColorSpace.get("oklch", "lch");
  let lightness = [space, "l"];
  return set$1(color, lightness, l => l * (1 + amount));
}
function darken(color) {
  let amount = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : .25;
  let space = ColorSpace.get("oklch", "lch");
  let lightness = [space, "l"];
  return set$1(color, lightness, l => l * (1 - amount));
}

var variations = /*#__PURE__*/Object.freeze({
  __proto__: null,
  lighten: lighten,
  darken: darken
});

/**
 * Functions related to color interpolation
 */
/**
 * Return an intermediate color between two colors
 * Signatures: mix(c1, c2, p, options)
 *             mix(c1, c2, options)
 *             mix(color)
 * @param {Color | string} c1 The first color
 * @param {Color | string} [c2] The second color
 * @param {number} [p=.5] A 0-1 percentage where 0 is c1 and 1 is c2
 * @param {Object} [o={}]
 * @return {Color}
 */

function mix(c1, c2) {
  let p = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : .5;
  let o = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
  [c1, c2] = [getColor(c1), getColor(c2)];

  if (type(p) === "object") {
    [p, o] = [.5, p];
  }

  let {
    space,
    outputSpace,
    premultiplied
  } = o;
  let r = range(c1, c2, {
    space,
    outputSpace,
    premultiplied
  });
  return r(p);
}
/**
 *
 * @param {Color | string | Function} c1 The first color or a range
 * @param {Color | string} [c2] The second color if c1 is not a range
 * @param {Object} [options={}]
 * @return {Color[]}
 */

function steps(c1, c2) {
  let options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
  let colorRange;

  if (isRange(c1)) {
    // Tweaking existing range
    [colorRange, options] = [c1, c2];
    [c1, c2] = colorRange.rangeArgs.colors;
  }

  let {
    maxDeltaE,
    deltaEMethod,
    steps = 2,
    maxSteps = 1000,
    ...rangeOptions
  } = options;

  if (!colorRange) {
    [c1, c2] = [getColor(c1), getColor(c2)];
    colorRange = range(c1, c2, rangeOptions);
  }

  let totalDelta = deltaE(c1, c2);
  let actualSteps = maxDeltaE > 0 ? Math.max(steps, Math.ceil(totalDelta / maxDeltaE) + 1) : steps;
  let ret = [];

  if (maxSteps !== undefined) {
    actualSteps = Math.min(actualSteps, maxSteps);
  }

  if (actualSteps === 1) {
    ret = [{
      p: .5,
      color: colorRange(.5)
    }];
  } else {
    let step = 1 / (actualSteps - 1);
    ret = Array.from({
      length: actualSteps
    }, (_, i) => {
      let p = i * step;
      return {
        p,
        color: colorRange(p)
      };
    });
  }

  if (maxDeltaE > 0) {
    // Iterate over all stops and find max deltaE
    let maxDelta = ret.reduce((acc, cur, i) => {
      if (i === 0) {
        return 0;
      }

      let ΔΕ = deltaE(cur.color, ret[i - 1].color, deltaEMethod);
      return Math.max(acc, ΔΕ);
    }, 0);

    while (maxDelta > maxDeltaE) {
      // Insert intermediate stops and measure maxDelta again
      // We need to do this for all pairs, otherwise the midpoint shifts
      maxDelta = 0;

      for (let i = 1; i < ret.length && ret.length < maxSteps; i++) {
        let prev = ret[i - 1];
        let cur = ret[i];
        let p = (cur.p + prev.p) / 2;
        let color = colorRange(p);
        maxDelta = Math.max(maxDelta, deltaE(color, prev.color), deltaE(color, cur.color));
        ret.splice(i, 0, {
          p,
          color: colorRange(p)
        });
        i++;
      }
    }
  }

  ret = ret.map(a => a.color);
  return ret;
}
/**
 * Interpolate to color2 and return a function that takes a 0-1 percentage
 * @param {Color | string | Function} color1 The first color or an existing range
 * @param {Color | string} [color2] If color1 is a color, this is the second color
 * @param {Object} [options={}]
 * @returns {Function} A function that takes a 0-1 percentage and returns a color
 */

function range(color1, color2) {
  let options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};

  if (isRange(color1)) {
    // Tweaking existing range
    let [r, options] = [color1, color2];
    return range(...r.rangeArgs.colors, { ...r.rangeArgs.options,
      ...options
    });
  }

  let {
    space,
    outputSpace,
    progression,
    premultiplied
  } = options;
  color1 = getColor(color1);
  color2 = getColor(color2); // Make sure we're working on copies of these colors

  color1 = clone(color1);
  color2 = clone(color2);
  let rangeArgs = {
    colors: [color1, color2],
    options
  };

  if (space) {
    space = ColorSpace.get(space);
  } else {
    space = ColorSpace.registry[defaults.interpolationSpace] || color1.space;
  }

  outputSpace = outputSpace ? ColorSpace.get(outputSpace) : space;
  color1 = to(color1, space);
  color2 = to(color2, space); // Gamut map to avoid areas of flat color

  color1 = toGamut(color1);
  color2 = toGamut(color2); // Handle hue interpolation
  // See https://github.com/w3c/csswg-drafts/issues/4735#issuecomment-635741840

  if (space.coords.h && space.coords.h.type === "angle") {
    let arc = options.hue = options.hue || "shorter";
    let hue = [space, "h"];
    let [θ1, θ2] = [get(color1, hue), get(color2, hue)];
    [θ1, θ2] = adjust(arc, [θ1, θ2]);
    set$1(color1, hue, θ1);
    set$1(color2, hue, θ2);
  }

  if (premultiplied) {
    // not coping with polar spaces yet
    color1.coords = color1.coords.map(c => c * color1.alpha);
    color2.coords = color2.coords.map(c => c * color2.alpha);
  }

  return Object.assign(p => {
    p = progression ? progression(p) : p;
    let coords = color1.coords.map((start, i) => {
      let end = color2.coords[i];
      return interpolate(start, end, p);
    });
    let alpha = interpolate(color1.alpha, color2.alpha, p);
    let ret = {
      space,
      coords,
      alpha
    };

    if (premultiplied) {
      // undo premultiplication
      ret.coords = ret.coords.map(c => c / alpha);
    }

    if (outputSpace !== space) {
      ret = to(ret, outputSpace);
    }

    return ret;
  }, {
    rangeArgs
  });
}
function isRange(val) {
  return type(val) === "function" && !!val.rangeArgs;
}
defaults.interpolationSpace = "lab";
function register(Color) {
  Color.defineFunction("mix", mix, {
    returns: "color"
  });
  Color.defineFunction("range", range, {
    returns: "function<color>"
  });
  Color.defineFunction("steps", steps, {
    returns: "array<color>"
  });
}

var interpolation = /*#__PURE__*/Object.freeze({
  __proto__: null,
  mix: mix,
  steps: steps,
  range: range,
  isRange: isRange,
  register: register
});

var HSL = new ColorSpace({
  id: "hsl",
  name: "HSL",
  coords: {
    h: {
      refRange: [0, 360],
      type: "angle",
      name: "Hue"
    },
    s: {
      range: [0, 100],
      name: "Saturation"
    },
    l: {
      range: [0, 100],
      name: "Lightness"
    }
  },
  base: sRGB,
  // Adapted from https://en.wikipedia.org/wiki/HSL_and_HSV#From_RGB
  fromBase: rgb => {
    let max = Math.max(...rgb);
    let min = Math.min(...rgb);
    let [r, g, b] = rgb;
    let [h, s, l] = [NaN, 0, (min + max) / 2];
    let d = max - min;

    if (d !== 0) {
      s = l === 0 || l === 1 ? 0 : (max - l) / Math.min(l, 1 - l);

      switch (max) {
        case r:
          h = (g - b) / d + (g < b ? 6 : 0);
          break;

        case g:
          h = (b - r) / d + 2;
          break;

        case b:
          h = (r - g) / d + 4;
      }

      h = h * 60;
    }

    return [h, s * 100, l * 100];
  },
  // Adapted from https://en.wikipedia.org/wiki/HSL_and_HSV#HSL_to_RGB_alternative
  toBase: hsl => {
    let [h, s, l] = hsl;
    h = h % 360;

    if (h < 0) {
      h += 360;
    }

    s /= 100;
    l /= 100;

    function f(n) {
      let k = (n + h / 30) % 12;
      let a = s * Math.min(l, 1 - l);
      return l - a * Math.max(-1, Math.min(k - 3, 9 - k, 1));
    }

    return [f(0), f(8), f(4)];
  },
  formats: {
    "hsl": {
      toGamut: true,
      coords: ["<number> | <angle>", "<percentage>", "<percentage>"]
    },
    "hsla": {
      coords: ["<number> | <angle>", "<percentage>", "<percentage>"],
      commas: true,
      lastAlpha: true
    }
  }
});

// See https://drafts.csswg.org/css-color-4/#the-hwb-notation
// Note that, like HSL, calculations are done directly on
// gamma-corrected sRGB values rather than linearising them first.

var HSV = new ColorSpace({
  id: "hsv",
  name: "HSV",
  coords: {
    h: {
      refRange: [0, 360],
      type: "angle",
      name: "Hue"
    },
    s: {
      range: [0, 100],
      name: "Saturation"
    },
    v: {
      range: [0, 100],
      name: "Value"
    }
  },
  base: HSL,

  // https://en.wikipedia.org/wiki/HSL_and_HSV#Interconversion
  fromBase(hsl) {
    let [h, s, l] = hsl;
    s /= 100;
    l /= 100;
    let v = l + s * Math.min(l, 1 - l);
    return [h, // h is the same
    v === 0 ? 0 : 200 * (1 - l / v), // s
    100 * v];
  },

  // https://en.wikipedia.org/wiki/HSL_and_HSV#Interconversion
  toBase(hsv) {
    let [h, s, v] = hsv;
    s /= 100;
    v /= 100;
    let l = v * (1 - s / 2);
    return [h, // h is the same
    l === 0 || l === 1 ? 0 : (v - l) / Math.min(l, 1 - l) * 100, l * 100];
  },

  formats: {
    color: {
      toGamut: true
    }
  }
});

// See https://drafts.csswg.org/css-color-4/#the-hwb-notation
// Note that, like HSL, calculations are done directly on
// gamma-corrected sRGB values rather than linearising them first.

var hwb = new ColorSpace({
  id: "hwb",
  name: "HWB",
  coords: {
    h: {
      refRange: [0, 360],
      type: "angle",
      name: "Hue"
    },
    w: {
      range: [0, 100],
      name: "Whiteness"
    },
    b: {
      range: [0, 100],
      name: "Blackness"
    }
  },
  base: HSV,

  fromBase(hsv) {
    let [h, s, v] = hsv;
    return [h, v * (100 - s) / 100, 100 - v];
  },

  toBase(hwb) {
    let [h, w, b] = hwb; // Now convert percentages to [0..1]

    w /= 100;
    b /= 100; // Achromatic check (white plus black >= 1)

    let sum = w + b;

    if (sum >= 1) {
      let gray = w / sum;
      return [h, 0, gray * 100];
    }

    let v = 1 - b;
    let s = v === 0 ? 0 : 1 - w / v;
    return [h, s * 100, v * 100];
  },

  formats: {
    "hwb": {
      toGamut: true,
      coords: ["<number> | <angle>", "<percentage>", "<percentage>"]
    }
  }
});

// http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html
// has greater numerical precision than section 4.3.5.3 of
// https://www.adobe.com/digitalimag/pdfs/AdobeRGB1998.pdf
// but the values below were calculated from first principles
// from the chromaticity coordinates of R G B W

const toXYZ_M$2 = [[0.5766690429101305, 0.1855582379065463, 0.1882286462349947], [0.29734497525053605, 0.6273635662554661, 0.07529145849399788], [0.02703136138641234, 0.07068885253582723, 0.9913375368376388]];
const fromXYZ_M$2 = [[2.0415879038107465, -0.5650069742788596, -0.34473135077832956], [-0.9692436362808795, 1.8759675015077202, 0.04155505740717557], [0.013444280632031142, -0.11836239223101838, 1.0151749943912054]];
var A98Linear = new RGBColorSpace({
  id: "a98rgb-linear",
  name: "Linear Adobe® 98 RGB compatible",
  white: "D65",
  toXYZ_M: toXYZ_M$2,
  fromXYZ_M: fromXYZ_M$2
});

var a98rgb = new RGBColorSpace({
  id: "a98rgb",
  name: "Adobe® 98 RGB compatible",
  base: A98Linear,
  toBase: RGB => RGB.map(val => Math.pow(Math.abs(val), 563 / 256) * Math.sign(val)),
  fromBase: RGB => RGB.map(val => Math.pow(Math.abs(val), 256 / 563) * Math.sign(val)),
  formats: {
    color: {
      id: "a98-rgb"
    }
  }
});

// using  D50 (so no chromatic adaptation needed afterwards)
// http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html

const toXYZ_M$1 = [[0.7977604896723027, 0.13518583717574031, 0.0313493495815248], [0.2880711282292934, 0.7118432178101014, 0.00008565396060525902], [0.0, 0.0, 0.8251046025104601]];
const fromXYZ_M$1 = [[1.3457989731028281, -0.25558010007997534, -0.05110628506753401], [-0.5446224939028347, 1.5082327413132781, 0.02053603239147973], [0.0, 0.0, 1.2119675456389454]];
var ProPhotoLinear = new RGBColorSpace({
  id: "prophoto-linear",
  name: "Linear ProPhoto",
  white: "D50",
  base: XYZ_D50,
  toXYZ_M: toXYZ_M$1,
  fromXYZ_M: fromXYZ_M$1
});

const Et = 1 / 512;
const Et2 = 16 / 512;
var prophoto = new RGBColorSpace({
  id: "prophoto",
  name: "ProPhoto",
  base: ProPhotoLinear,

  toBase(RGB) {
    // Transfer curve is gamma 1.8 with a small linear portion
    return RGB.map(v => v < Et2 ? v / 16 : v ** 1.8);
  },

  fromBase(RGB) {
    return RGB.map(v => v >= Et ? v ** (1 / 1.8) : 16 * v);
  },

  formats: {
    color: {
      id: "prophoto-rgb"
    }
  }
});

var oklch = new ColorSpace({
  id: "oklch",
  name: "OKLCh",
  coords: {
    l: {
      refRange: [0, 1],
      name: "Lightness"
    },
    c: {
      refRange: [0, 0.4],
      name: "Chroma"
    },
    h: {
      refRange: [0, 360],
      type: "angle",
      name: "Hue"
    }
  },
  white: "D65",
  base: OKLab,

  fromBase(oklab) {
    // Convert to polar form
    let [L, a, b] = oklab;
    let h;
    const ε = 0.0002; // chromatic components much smaller than a,b

    if (Math.abs(a) < ε && Math.abs(b) < ε) {
      h = NaN;
    } else {
      h = Math.atan2(b, a) * 180 / Math.PI;
    }

    return [L, // OKLab L is still L
    Math.sqrt(a ** 2 + b ** 2), // Chroma
    constrain(h) // Hue, in degrees [0 to 360)
    ];
  },

  // Convert from polar form
  toBase(oklch) {
    let [L, C, h] = oklch;
    let a, b; // check for NaN hue

    if (isNaN(h)) {
      a = 0;
      b = 0;
    } else {
      a = C * Math.cos(h * Math.PI / 180);
      b = C * Math.sin(h * Math.PI / 180);
    }

    return [L, a, b];
  },

  formats: {
    "oklch": {
      coords: ["<number> | <percentage>", "<number>", "<number> | <angle>"]
    }
  }
});

const Yw = 203; // absolute luminance of media white, cd/m²

const n = 2610 / 2 ** 14;
const ninv = 2 ** 14 / 2610;
const m = 2523 / 2 ** 5;
const minv = 2 ** 5 / 2523;
const c1 = 3424 / 2 ** 12;
const c2 = 2413 / 2 ** 7;
const c3 = 2392 / 2 ** 7;
var rec2100Pq = new RGBColorSpace({
  id: "rec2100pq",
  name: "REC.2100-PQ",
  base: REC2020Linear,

  toBase(RGB) {
    // given PQ encoded component in range [0, 1]
    // return media-white relative linear-light
    return RGB.map(function (val) {
      let x = (Math.max(val ** minv - c1, 0) / (c2 - c3 * val ** minv)) ** ninv;
      return x * 10000 / Yw; // luminance relative to diffuse white, [0, 70 or so].
    });
  },

  fromBase(RGB) {
    // given media-white relative linear-light
    // returnPQ encoded component in range [0, 1]
    return RGB.map(function (val) {
      let x = Math.max(val * Yw / 10000, 0); // absolute luminance of peak white is 10,000 cd/m².

      let num = c1 + c2 * x ** n;
      let denom = 1 + c3 * x ** n;
      return (num / denom) ** m;
    });
  },

  formats: {
    color: {
      id: "rec2100-pq"
    }
  }
});

const a = 0.17883277;
const b = 0.28466892; // 1 - (4 * a)

const c = 0.55991073; // 0.5 - a * Math.log(4 *a)

var rec2100Hlg = new RGBColorSpace({
  id: "rec2100hlg",
  cssid: "rec2100-hlg",
  name: "REC.2100-HLG",
  referred: "scene",
  base: REC2020Linear,

  toBase(RGB) {
    // given HLG encoded component in range [0, 1]
    // return media-white relative linear-light
    return RGB.map(function (val) {
      if (val <= 1 / 12) {
        return Math.sqrt(3 * val);
      }

      return a * Math.log(12 * val - b) + c;
    });
  },

  fromBase(RGB) {
    // given media-white relative linear-light
    // return HLG encoded component in range [0, 1]
    // per ITU Rec BT.2390
    return RGB.map(function (val) {
      if (val <= 0.5) {
        return val ** 2 / 3;
      }

      return Math.exp((val - c) / a + b) / 12;
    });
  },

  formats: {
    color: {
      id: "rec2100-hlg"
    }
  }
});

// The ACES whitepoint
// see TB-2018-001 Derivation of the ACES White Point CIE Chromaticity Coordinates
// also https://github.com/ampas/aces-dev/blob/master/documents/python/TB-2018-001/aces_wp.py
// Similar to D60

WHITES.ACES = [0.32168 / 0.33767, 1.00000, (1.00000 - 0.32168 - 0.33767) / 0.33767]; // convert an array of linear-light ACEScc values to CIE XYZ

const toXYZ_M = [[0.6624541811085053, 0.13400420645643313, 0.1561876870049078], [0.27222871678091454, 0.6740817658111484, 0.05368951740793705], [-0.005574649490394108, 0.004060733528982826, 1.0103391003129971]];
const fromXYZ_M = [[1.6410233796943257, -0.32480329418479, -0.23642469523761225], [-0.6636628587229829, 1.6153315916573379, 0.016756347685530137], [0.011721894328375376, -0.008284441996237409, 0.9883948585390215]];
var ACEScg = new RGBColorSpace({
  id: "acescg",
  name: "ACEScg",
  // ACEScg – A scene-referred, linear-light encoding of ACES Data
  // https://docs.acescentral.com/specifications/acescg/
  // uses the AP1 primaries, see section 4.3.1 Color primaries
  coords: {
    r: {
      range: [0, 65504],
      name: "Red"
    },
    g: {
      range: [0, 65504],
      name: "Green"
    },
    b: {
      range: [0, 65504],
      name: "Blue"
    }
  },
  referred: "scene",
  white: WHITES.ACES,
  toXYZ_M,
  fromXYZ_M,
  formats: {
    color: {}
  }
}); // export default Color;

const ε = 2 ** -16; // the smallest value which, in the 32bit IEEE 754 float encoding,
// decodes as a non-negative value

const ACES_min_nonzero = -0.35828683; // brightest encoded value, decodes to 65504

const ACES_cc_max = (Math.log2(65504) + 9.72) / 17.52; // 1.468

var acescc = new RGBColorSpace({
  id: "acescc",
  name: "ACEScc",
  // see S-2014-003 ACEScc – A Logarithmic Encoding of ACES Data
  // https://docs.acescentral.com/specifications/acescc/
  // uses the AP1 primaries, see section 4.3.1 Color primaries
  // Appendix A: "Very small ACES scene referred values below 7 1/4 stops
  // below 18% middle gray are encoded as negative ACEScc values.
  // These values should be preserved per the encoding in Section 4.4
  // so that all positive ACES values are maintained."
  coords: {
    r: {
      range: [ACES_min_nonzero, ACES_cc_max],
      name: "Red"
    },
    g: {
      range: [ACES_min_nonzero, ACES_cc_max],
      name: "Green"
    },
    b: {
      range: [ACES_min_nonzero, ACES_cc_max],
      name: "Blue"
    }
  },
  referred: "scene",
  base: ACEScg,

  // from section 4.4.2 Decoding Function
  toBase(RGB) {
    const low = (9.72 - 15) / 17.52; // -0.3014

    return RGB.map(function (val) {
      if (val <= low) {
        return (2 ** (val * 17.52 - 9.72) - ε) * 2; // very low values, below -0.3014
      } else if (val < ACES_cc_max) {
        return 2 ** (val * 17.52 - 9.72);
      } else {
        // val >= ACES_cc_max
        return 65504;
      }
    });
  },

  // Non-linear encoding function from S-2014-003, section 4.4.1 Encoding Function
  fromBase(RGB) {
    return RGB.map(function (val) {
      if (val <= 0) {
        return (Math.log2(ε) + 9.72) / 17.52; // -0.3584
      } else if (val < ε) {
        return (Math.log2(ε + val * 0.5) + 9.72) / 17.52;
      } else {
        // val >= ε
        return (Math.log2(val) + 9.72) / 17.52;
      }
    });
  },

  // encoded media white (rgb 1,1,1) => linear  [ 222.861, 222.861, 222.861 ]
  // encoded media black (rgb 0,0,0) => linear [ 0.0011857, 0.0011857, 0.0011857]
  formats: {
    color: {}
  }
});

var spaces = /*#__PURE__*/Object.freeze({
  __proto__: null,
  XYZ_D65: XYZ_D65,
  XYZ_D50: XYZ_D50,
  XYZ_ABS_D65: XYZ_Abs_D65,
  Lab_D65: lab_d65,
  Lab: lab,
  LCH: lch,
  sRGB_Linear: sRGBLinear,
  sRGB: sRGB,
  HSL: HSL,
  HWB: hwb,
  HSV: HSV,
  P3_Linear: P3Linear,
  P3: P3,
  A98RGB_Linear: A98Linear,
  A98RGB: a98rgb,
  ProPhoto_Linear: ProPhotoLinear,
  ProPhoto: prophoto,
  REC_2020_Linear: REC2020Linear,
  REC_2020: REC2020,
  OKLab: OKLab,
  OKLCH: oklch,
  Jzazbz: Jzazbz,
  JzCzHz: jzczhz,
  ICTCP: ictcp,
  REC_2100_PQ: rec2100Pq,
  REC_2100_HLG: rec2100Hlg,
  ACEScg: ACEScg,
  ACEScc: acescc
});

/**
 * Class that represents a color
 */

var _space = /*#__PURE__*/new WeakMap();

class Color {
  /**
   * Creates an instance of Color.
   * Signatures:
   * - `new Color(stringToParse)`
   * - `new Color(otherColor)`
   * - `new Color({space, coords, alpha})`
   * - `new Color(space, coords, alpha)`
   * - `new Color(spaceId, coords, alpha)`
   */
  constructor() {
    _classPrivateFieldInitSpec(this, _space, {
      writable: true,
      value: void 0
    });

    let color;

    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    if (args.length === 1) {
      color = getColor(args[0]);
    }

    let space, coords, alpha;

    if (color) {
      space = color.space || color.spaceId;
      coords = color.coords;
      alpha = color.alpha;
    } else {
      // default signature new Color(ColorSpace, array [, alpha])
      [space, coords, alpha] = args;
    }

    _classPrivateFieldSet(this, _space, ColorSpace.get(space));

    this.coords = coords ? coords.slice() : [0, 0, 0];
    this.alpha = alpha < 1 ? alpha : 1; // this also deals with NaN etc
    // Convert "NaN" to NaN

    for (let i = 0; i < this.coords.length; i++) {
      if (this.coords[i] === "NaN") {
        this.coords[i] = NaN;
      }
    } // Define getters and setters for each coordinate


    for (let id in _classPrivateFieldGet(this, _space).coords) {
      Object.defineProperty(this, id, {
        get: () => this.get(id),
        set: value => this.set(id, value)
      });
    }
  }

  get space() {
    return _classPrivateFieldGet(this, _space);
  }

  get spaceId() {
    return _classPrivateFieldGet(this, _space).id;
  }

  clone() {
    return new Color(this.space, this.coords, this.alpha);
  }

  toJSON() {
    return {
      spaceId: this.spaceId,
      coords: this.coords,
      alpha: this.alpha
    };
  }

  display() {
    for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
      args[_key2] = arguments[_key2];
    }

    let ret = display(this, ...args); // Convert color object to Color instance

    ret.color = new Color(ret.color);
    return ret;
  }
  /**
   * Get a color from the argument passed
   * Basically gets us the same result as new Color(color) but doesn't clone an existing color object
   */


  static get(color) {
    if (color instanceof Color) {
      return color;
    }

    for (var _len3 = arguments.length, args = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
      args[_key3 - 1] = arguments[_key3];
    }

    return new Color(color, ...args);
  }

  static defineFunction(name, code) {
    let o = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : code;

    if (arguments.length === 1) {
      [name, code, o] = [arguments[0].name, arguments[0], arguments[0]];
    }

    let {
      instance = true,
      returns
    } = o;

    let func = function () {
      let ret = code(...arguments);

      if (returns === "color") {
        ret = Color.get(ret);
      } else if (returns === "function<color>") {
        let f = ret;

        ret = function () {
          let ret = f(...arguments);
          return Color.get(ret);
        }; // Copy any function metadata


        Object.assign(ret, f);
      } else if (returns === "array<color>") {
        ret = ret.map(c => Color.get(c));
      }

      return ret;
    };

    if (!(name in Color)) {
      Color[name] = func;
    }

    if (instance) {
      Color.prototype[name] = function () {
        for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {
          args[_key4] = arguments[_key4];
        }

        return func(this, ...args);
      };
    }
  }

  static defineFunctions(o) {
    for (let name in o) {
      Color.defineFunction(name, o[name], o[name]);
    }
  }

  static extend(exports) {
    if (exports.register) {
      exports.register(Color);
    } else if (exports.default) {
      Color.defineFunction(exports.default.name, exports.default);
    } else if (typeof exports === "function") {
      Color.defineFunction(exports);
    } else {
      // No register method, just add the module's functions
      for (let name in exports) {
        Color.defineFunction(name, exports[name]);
      }
    }
  }

}
Color.defineFunctions({
  get,
  getAll,
  set: set$1,
  setAll,
  to,
  equals,
  inGamut,
  toGamut,
  distance,
  toString: serialize
});
Object.assign(Color, {
  util,
  hooks: hooks$1,
  WHITES,
  Space: ColorSpace,
  spaces: ColorSpace.registry,
  parse,
  // Global defaults one may want to configure
  defaults
});

for (let key of Object.keys(spaces)) {
  ColorSpace.register(spaces[key]);
}

// Import all modules of Color.js
Color.extend(deltaEMethods);
Color.extend(deltaE$1); // Import optional modules
Color.extend(variations);
Color.extend(contrast);
Color.extend(chromaticity);
Color.extend(luminance);
Color.extend(interpolation);
Color.extend(contrastMethods);

exports["default"] = Color;
//# sourceMappingURL=color.legacy.cjs.map