/**
 * Calculates the lightness component of CIELAB from CIE 1931 XYZ.
 * The X and Z components are omitted because they are unnecessary for the conversion.
 *
 * @param y The Y component of CIE 1931 XYZ.
 *
 * @returns The lightness component of CIELAB.
 * @see https://en.wikipedia.org/wiki/CIELAB_color_space#From_CIE_XYZ_to_CIELAB
 */
export declare const toCIELABLFromCIE1931XYZ: (y: number) => number;
/**
 * Calculates the a component of CIELAB from CIE 1931 XYZ.
 * The Z component is omitted because it is unnecessary for the conversion.
 *
 * @param x The X component of CIE 1931 XYZ.
 * @param y The Y component of CIE 1931 XYZ.
 *
 * @returns The a component of CIELAB.
 * @see https://en.wikipedia.org/wiki/CIELAB_color_space#From_CIE_XYZ_to_CIELAB
 */
export declare const toCIELABAFromCIE1931XYZ: (x: number, y: number) => number;
/**
 * Calculates the b component of CIELAB from CIE 1931 XYZ.
 * The X component is omitted because it is unnecessary for the conversion.
 *
 * @param y The Y component of CIE 1931 XYZ.
 * @param z The Z component of CIE 1931 XYZ.
 *
 * @returns The b component of CIELAB.
 * @see https://en.wikipedia.org/wiki/CIELAB_color_space#From_CIE_XYZ_to_CIELAB
 */
export declare const toCIELABBFromCIE1931XYZ: (y: number, z: number) => number;
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