import { ColorObject } from './color-object.js';

/**
 * Modifies the shade of a color by adding black per given `ratio` between `0` and `1`.
 *
 * A `ratio` of `0` will return the original color while a `ratio` of `1` will return black.
 *
 * By default an exponential algo is applied but the `useLinear` flag can be set to use a linear algo.
 *
 * @returns A color object with the new color values.
 */
declare function shade(rgbOrRgbaOrHex: string, ratio: number, useLinear?: boolean): ColorObject;
/**
 * Modifies the tint of a color by adding white per given `ratio` between `0` and `1`.
 *
 * A `ratio` of `0` will return the original color while a `ratio` of `1` will return white.
 *
 * By default an exponential algo is applied but the `useLinear` flag can be set to use a linear algo.
 *
 * @returns A color object with the new color values.
 */
declare function tint(rgbOrRgbaOrHex: string, ratio: number, useLinear?: boolean): ColorObject;
/**
 * Modifies the tone of a color by adding gray per given `ratio` between `0` and `1`.
 *
 * A `ratio` of `0` will return the original color while a `ratio` of `1` will return gray.
 *
 * By default an exponential algo is applied but the `useLinear` flag can be set to use a linear algo.
 *
 * @returns A color object with the new color values.
 */
declare function tone(rgbOrRgbaOrHex: string, ratio: number, useLinear?: boolean): ColorObject;

export { shade, tint, tone };