import { RgbaColor } from '../../meta/color';
/**
 * Returns a string value for the color. The returned result is the smallest possible rgba or hex notation.
 *
 * @example
 * background: rgba(255, 205, 100, 0.7),
 * background: rgba({ red: 255, green: 205, blue: 100, alpha: 0.7 }),
 * background: rgba(255, 205, 100, 1),
 */
export declare function rgba(value: RgbaColor | number, green?: number, blue?: number, alpha?: number): string;