export declare const RGB_COLOR_REGEX: RegExp;
export declare class FgpColor {
    r: number;
    g: number;
    b: number;
    a: number;
    constructor();
    constructor(r?: string);
    constructor(r?: string | number, g?: number, b?: number);
    toHex(): string;
    toRgb(): string;
    toRgba(): string;
    toRgbWithAlpha(a: number): string;
}
export declare function hsvToRGB(hue: number, saturation: number, value: number): string;