import { ColorGrayScaleAlpha } from "./gray-scale-alpha";
import { ColorGrayScale } from "./gray-scale";
import { ColorRGB } from "./rgb";
import { ColorPalette, Palette } from "./palette";
/**
 * Represents a color of color type `ColorType.RGBA`.
 *
 * @see ColorType
 */
export declare type ColorRGBA = [number, number, number, number] & {
    r: number;
    g: number;
    b: number;
    a: number;
};
/**
 * Create a new color of type `number`.
 *
 * @param r The value for the `red` part of the color.
 * @param g The value for the `green` part of the color.
 * @param b The value for the `blue` part of the color.
 * @param a The value for the alpha channel part of the color.
 *
 * @return The color in rgba representation.
 */
export declare function colorRGBA(r: number, g: number, b: number, a: number): ColorRGBA;
/**
 * Checks if the given parameter is a color of type `ColorRGBA`.
 *
 * @param color The input to check.
 *
 * @return `true` if `color` was of type `ColorRGBA` and `false` otherwise.
 */
export declare function isColorRGBA(color: any): color is ColorRGBA;
/**
 * Convert a color in any format to rgba format.
 *
 * @param color The color to convert.
 * @param palette The palette to use if the color is in palette format. Will be ignored otherwise.
 *
 * @return The color converted to rgba format or `undefined` if the color couldn't be converted.
 */
export declare function convertToRGBA(color: ColorGrayScaleAlpha | ColorGrayScale | ColorRGB | ColorPalette | ColorRGBA, palette?: Palette): ColorRGBA;