/**
 * Sets the lightness of a color to the provided value. The lightness range can be
 * from 0 and 1.
 *
 * @example
 * background: setLightness(0.2, '#CCCD64'),
 * background: setLightness(0.75, 'rgba(204,205,100,0.7)'),
 */
export declare function setLightness(lightness: number, color: string): string;