import type { Color, ColorOp, ReadonlyColor } from "../api.js";
/**
 * Converts XYZ to Lab, using provided reference white point (default:
 * {@link D50}). Also see {@link xyzLabD65}.
 *
 * @remarks
 * Important: We're using a normalized Lab space w/ all three coordinates
 * divided by 100 (normalized to 100% luminance).
 *
 * @param out -
 * @param src -
 * @param white -
 */
export declare const xyzLab: (out: Color | null, src: ReadonlyColor, white?: number[]) => import("@thi.ng/vectors").Vec<number>;
/**
 * Same as {@link xyzLab}, but hard coded to use {@link D65} white point.
 *
 * @param out -
 * @param src -
 */
export declare const xyzLabD65: ColorOp;
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