import type { ColorHex, ColorRgb, ColorHsl, ColorHsb, ColorHcl, ColorLab, ColorRepresentation } from './types';
/**
 * Normalize a color representation into RGB
 *
 * @param {ColorRepresentation} color Color representation
 * @returns {ColorRgb} Normalized RGB color
 */
export declare function normalizeColor(color: ColorRepresentation): ColorRgb;
/**
 * Normalize an hexadecimal string
 *
 * @param {string} hex Hexadecimal string
 * @returns {string} Normalized hexadecimal string
 */
export declare function normalizeHexString(hex: string): string;
/**
 * Convert RGB to hexadecimal
 *
 * Note:
 *  - RGB values are contained in the interval [0, 1]
 *
 * @param  {ColorRgb} rgb RGB color
 * @returns {ColorHex} Hexadecimal color
 */
export declare function rgbToHex([r, g, b]: ColorRgb): ColorHex;
/**
 * Convert RGB to hexadecimal string
 *
 * Note:
 *  - RGB values are contained in the interval [0, 1]
 *
 * @param  {ColorRgb} rgb RGB color
 * @returns {string} Hexadecimal string
 */
export declare function rgbToHexString([r, g, b]: ColorRgb): string;
/**
 * Convert hexadecimal to RGB
 *
 * Note:
 *  - RGB values are contained in the interval [0, 1]
 *
 * @param  {ColorHex|string} hex Hexadecimal color
 * @returns {ColorRgb} RGB color
 */
export declare function hexToRgb(hex: ColorHex | string): ColorRgb;
/**
 * Lighten a color
 *
 * @param {string} hex Hexadecimal string
 * @param {number} [amount=0] Amount of the color offset
 * @returns {string} Computed hexadecimal
 */
export declare function lighten(hex: string, amount?: number): string;
/**
 * Darken a color
 *
 * @param {string} hex Hexadecimal string
 * @param {number} [amount=0] Amount of the color offset
 * @returns {string} Computed hexadecimal
 */
export declare function darken(hex: string, amount?: number): string;
/**
 * Normalize an HSL string
 *
 * Note:
 *   - HSL values are contained in the intervals:
 *     - Hue:        [0, 360]
 *     - Saturation: [0, 1]
 *     - Lightness:  [0, 1]
 *
 * @param  {string} hsl HSL string (format: 'hsl(360, 100%, 100%)')
 * @returns {ColorHsl} Normalized HSL color
 */
export declare function normalizeHslString(hsl: string): ColorHsl;
/**
 * Convert RGB to HSL
 *
 * Notes:
 *   - RGB values are contained in the interval [0, 1]
 *   - HSL values are contained in the intervals:
 *     - Hue:        [0, 360]
 *     - Saturation: [0, 1]
 *     - Lightness:  [0, 1]
 *
 * @param  {ColorHgb} rgb RGB color
 * @returns {ColorHsl} HSL color
 */
export declare function rgbToHsl([r, g, b]: ColorRgb): ColorHsl;
/**
 * Convert HSL to RGB
 *
 * Notes:
 *   - RGB values are contained in the interval [0, 1]
 *   - HSL values are contained in the intervals:
 *     - Hue:        [0, 360]
 *     - Saturation: [0, 1]
 *     - Lightness:  [0, 1]
 *
 * @param  {ColorHsl} hsl HSL color
 * @returns {ColorRgb} RGB color
 */
export declare function hslToRgb([h, s, l]: ColorHsl): ColorRgb;
/**
 * Convert RGB to HSB
 *
 * Notes:
 *   - RGB values are contained in the interval [0, 1]
 *   - HSB values are contained in the intervals:
 *     - Hue:        [0, 360]
 *     - Saturation: [0, 1]
 *     - Brightness: [0, 1]
 *
 * @param  {ColorRgb} rgb RGB color
 * @returns {ColorHsb} HSB color
 */
export declare function rgbToHsb([r, g, b]: ColorRgb): ColorHsb;
/**
 * Convert HSB to RGB
 *
 * Notes:
 *   - RGB values are contained in the interval [0, 1]
 *   - HSB values are contained in the intervals:
 *     - Hue:        [0, 360]
 *     - Saturation: [0, 1]
 *     - Brightness: [0, 1]
 *
 * @param  {ColorHsb} hsb HSB color
 * @returns {ColorRgb} RGB color
 */
export declare function hsbToRgb([h, s, b]: ColorHsb): ColorRgb;
/**
 * Convert L*a*b* to HCL
 *   -> http://www.brucelindbloom.com/index.html?Eqn_Lab_to_LCH.html
 *
 * Notes:
 *   - L*a*b* values are contained in the intervals:
 *     - Lightness:        [0 à 100]
 *     - a (green, red):   [~-128, ~+128]
 *     - b (blue, yellow): [~-128, ~+128]
 *   - HCL values are contained in the intervals:
 *     - Hue:       [0, 360]
 *     - Chroma:    [0, ~150]
 *     - Lightness: [0, 100]
 *
 * @param {ColorLab} lab L*a*b* color
 * @returns {ColorHcl} HCL color
 */
export declare function labToHcl([l, a, b]: ColorLab): ColorHcl;
/**
 * Convert HCL to L*a*b*
 *   -> http://www.brucelindbloom.com/index.html?Eqn_LCH_to_Lab.html
 *
 * Notes:
 *   - HCL values are contained in the intervals:
 *     - Hue:       [0, 360]
 *     - Chroma:    [0, ~150]
 *     - Lightness: [0, 100]
 *   - L*a*b* values are contained in the intervals:
 *     - Lightness:        [0 à 100]
 *     - a (green, red):   [~-128, ~+128]
 *     - b (blue, yellow): [~-128, ~+128]
 *
 * @param {ColorHcl} hcl HCL color
 * @returns {ColorLab} L*a*b* color
 */
export declare function hclToLab([h, c, l]: ColorHcl): ColorLab;
/**
 * Convert L*a*b* to RGB
 *
 * Notes:
 *   - RGB values are contained in the interval [0, 1]
 *   - L*a*b* values are contained in the intervals:
 *     - Lightness:        [0 à 100]
 *     - a (green, red):   [~-128, ~+128]
 *     - b (blue, yellow): [~-128, ~+128]
 *
 * @param {ColorLab} lab L*a*b* color
 * @returns {ColorRgb} RGB color
 */
export declare function labToRgb([l, a, b]: ColorLab): ColorRgb;
/**
 * Convert RGB to L*a*b*
 *
 * Notes:
 *   - RGB values are contained in the interval [0, 1]
 *   - L*a*b* values are contained in the intervals:
 *     - Lightness:        [0 à 100]
 *     - a (green, red):   [~-128, ~+128]
 *     - b (blue, yellow): [~-128, ~+128]
 *
 * @param {ColorRgb} rgb RGB color
 * @returns {ColorLab} L*a*b* color
 */
export declare function rgbToLab([r, g, b]: ColorRgb): ColorLab;
/**
 * Get the delta from two L*a*b* colors
 *
 * Note:
 *   - L*a*b* values are contained in the intervals:
 *     - Lightness:        [0 à 100]
 *     - a (green, red):   [~-128, ~+128]
 *     - b (blue, yellow): [~-128, ~+128]
 *
 * @param {ColorLab} lab1 First L*a*b* color
 * @param {ColorLab} lab2 Second L*a*b* color
 * @returns {number}
 */
export declare function deltaE(lab1: ColorLab, lab2: ColorLab): number;
/**
 * Convert RGB to HCL
 *
 * Notes:
 *   - RGB values are contained in the interval [0, 1]
 *   - HCL values are contained in the intervals:
 *     - Hue:       [0, 360]
 *     - Chroma:    [0, ~150]
 *     - Luminance: [0, 100]
 *
 * @param {ColorRgb} rgb RGB color
 * @returns {ColorHcl} HCL color
 */
export declare function rgbToHcl([r, g, b]: ColorRgb): ColorHcl;
/**
 * Converts HCL to RGB
 *
 * Notes:
 *   - RGB values are contained in the interval [0, 1]
 *   - HCL values are contained in the intervals:
 *     - Hue:       [0, 360]
 *     - Chroma:    [0, ~150]
 *     - Luminance: [0, 100]
 *
 * @param {ColorHcl} hcl RGB color
 * @returns {ColorRgb} RGB color
 */
export declare function hclToRgb([h, c, l]: ColorHcl): ColorRgb;