export type RGB = readonly [number, number, number];
export type RGBA = readonly [number, number, number, number];
export type HSL = readonly [number, number, number];
export type HSLA = readonly [number, number, number, number];
export type HSV = readonly [number, number, number];
export type HexColor = `#${string}`;
export type RGBColor = `rgb${'a' | ''}(${string})`;
export type HSLColor = `hsl${'a' | ''}(${string})`;
export declare const commonColors: `#${string}`[];
export declare function rgbToRgbColor([r, g, b, a]: RGB | RGBA): RGBColor;
export declare function rgbToHslColor([r, g, b, a]: RGB | RGBA): HSLColor;
export declare function rgbToHexColor(rgba: RGB | RGBA): HexColor;
export declare function randomColor(): RGB;
export declare function randomColor(type: 'rgba'): RGBColor;
export declare function randomColor(type: 'hsla'): HSLColor;
export declare function randomColor(type: 'hex'): HexColor;
export declare function parseHexColor(str: HexColor): RGBA;
/**
 * Note: ignore alpha
 */
export declare function luminance([r, g, b]: RGB | RGBA): number;
/**
 * Note: ignore alpha
 */
export declare function contrast(rgb1: RGB | RGBA, rgb2: RGB | RGBA): number;
/**
 * Note: ignore alpha
 *
 * @see
 * https://stackoverflow.com/questions/8022885/rgb-to-hsv-color-in-javascript
 */
export declare function rgbToHsl(rgb: RGB | RGBA): HSL;
export declare function hslToRgb([h, s, l]: HSL | HSLA): RGB;
export declare function rgbToHsv(rgb: RGB | RGBA): HSV;
export declare function hsvToRgb([h, s, v]: HSV): RGB;
export declare function hslToHsv([h, s, l]: HSL | HSLA): HSV;
export declare function hsvToHsl([h, s, v]: HSV): HSL;
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