/**
 * COLOR FUNCTIONS =============================================================
 * =============================================================================
 */
/**
 * Turn Gradient Color Scale into Divided Groups of Gradients with more Distinct Hues Between Adjacent Colors
 * @example:
 *    colorScaleDistinct(chroma.scale([GOLD_INVERSE, TEAL_INVERSE, VIOLET_INVERSE]).colors(keys.length), 3)
 *
 * @param {Array} colors - list of gradient color values to make distinct
 * @param {Number} hues - count of distinct colors used in the given gradient
 * @return {Array} colors - grouped in distinct gradients
 */
export function colorScaleDistinct(colors: any[], hues: number): any[];
/**
 * Convert given value to a standardized RGB(A) Color Array
 *
 * @param {Array|String} value - to check
 * @return {Array|Boolean} color - if it's a valid color value, else `false`
 */
export function toRgbaColor(value: any[] | string): any[] | boolean;
/**
 * Check if given value is a valid Array of RGB(A) color numbers/strings
 *
 * @param {Array} color - to check
 * @returns {Boolean} true - if it's valid
 */
export function isRgba(color: any[]): boolean;
/**
 * Convert an RGB Color to Scaled Color3 Array
 * @note: in certain frameworks, like Babylon.js, Color3 is an array of RGB numbers ranging from 0 to 1.
 *
 * @param {Array<Number | String>} color - with RGB values ranging from 0 to 255
 * @param {Number} [precision] - decimal places to keep
 * @returns {Array<Number>} Color3 - with RGB values ranging from 0 to 1
 */
export function rgbToColor3(color: Array<number | string>, precision?: number | undefined): Array<number>;
/**
 * Convert a Scaled Color3 Array to an RGB Color
 * @note: in certain frameworks, like Babylon.js, Color3 is an array of RGB numbers ranging from 0 to 1.
 *
 * @param {Array<Number>} color3 - with RGB values ranging from 0 to 1
 * @returns {Array<Number | String>} color - with RGB values ranging from 0 to 255
 */
export function rgbFromColor3(color3: Array<number>): Array<number | string>;
/**
 * Convert an RGB Color array to Hex String
 * @param {[r: number, g: number, b: number]} array - of [r, g, b] numbers
 * @return {String} hex color
 */
export function rgbToHex([r, g, b]: [r: number, g: number, b: number]): string;
/**
 * Convert a Hex String to RGB Color if valid
 * @param {String} hex - string with or without `#` at the beginning
 * @return {Array<Number>|Null} RGB color array - if given valid hex string, else null
 */
export function rgbFromHex(hex: string): Array<number> | null;