import Color from "color";
export declare type ColorInputType = string | Color;
export interface HslaInputType {
    hue?: number;
    saturation?: number;
    lightness?: number;
    alpha?: number;
}
export declare const toRgb: (color: ColorInputType) => string;
export declare const toHex: (color: ColorInputType) => string;
export declare const toHsl: (color: ColorInputType) => string;
export declare const darken: (color: ColorInputType, tonalOffset: number) => string;
export declare const lighten: (color: ColorInputType, tonalOffset: number) => string;
/**
 * Calculates the relative brightness of any point in a color space.
 */
export declare const getLuminance: (color: ColorInputType) => number;
/**
 * Calculates the contrast ratio between two colors.
 *
 * A contrast ratio value in the range 1 (same color) to 21 (contrast b/w white and black).
 */
export declare const calculateContrastRatio: (foreground: ColorInputType, background: ColorInputType) => number;
export declare const adjustColorHsla: (color: ColorInputType, adjustment: HslaInputType) => string;
export declare const changeColorHsla: (color: ColorInputType, change: HslaInputType) => string;
export declare const opaquify: (translucentForeground: ColorInputType, opaqueBackground: ColorInputType) => string;