import type { MaybeColor } from "./api.js";
/**
 * Multi-method to compute relative luminance from any supported input color
 * format.
 *
 * @remarks
 * For many color spaces, luminance-related information is readily available and
 * will simply result in looking up the relevant channel value. For others,
 * unless a direct implementation is available, colors will first be converted
 * to linear RGB.
 */
export declare const luminance: import("@thi.ng/defmulti").MultiFn1<MaybeColor, number>;
//# sourceMappingURL=luminance.d.ts.map