export declare const darken: (color: string, gap?: number, newColorValue?: string) => string;
export declare const deriveColor: (color: string, gap: number | undefined, dark: boolean, newColorValue?: string) => string;
export declare const lighten: (color: string, gap: number, newColorValue?: string) => string;
export declare const hexToRgb: (hex: string) => {
    r: number;
    g: number;
    b: number;
} | null;
export declare const rgbToHex: (r: number, g: number, b: number) => string;
export declare const applyOpacity: (color: string, opacity: number | string) => string;