/*!
 * Copyright (c) Microsoft Corporation.
 * Licensed under the MIT License.
 */
import { vec3 } from "gl-matrix";
export declare class ColorHelper {
    static readonly LUMINANCE: vec3;
    static luminance(rgb: vec3): number;
    static rgbToHex(r: number, g: number, b: number): string;
    static rgbToHsv(r: number, g: number, b: number, hsv: vec3 | [number, number, number]): void;
    static hsvToRgb(h: number, s: number, v: number, rgb: vec3 | [number, number, number]): void;
}