export declare function hexToRgb(hex: string): {
    r: number;
    g: number;
    b: number;
};
export declare function rgbToHex(rgb: {
    r: number;
    g: number;
    b: number;
}): string;
export declare const colorToGray: (color: {
    r: number;
    g: number;
    b: number;
}, saturation?: number) => {
    r: number;
    g: number;
    b: number;
};
export declare function reversePalette(colors: Record<string, string>): Record<string, string>;
export declare function apcaContrast(foreground: string | undefined, background: string | undefined): number;