declare class Color {
    /**
     * Red channel
     */
    r: number;
    /**
     * Blue channel
     */
    g: number;
    /**
     * Green channel
     */
    b: number;
    /**
     * Alpha channel
     */
    a: number;
    /**
     * RGBA color.
     *
     * @param r Red value in range [0, 255]
     * @param g Green value in range [0, 255]
     * @param b Blue value in range [0, 255]
     * @param a Alpha channel in range [0, 255]
     * @return New color object
     */
    constructor(r: number, g: number, b: number, a?: number);
    /**
     * Create a new copy of the current color.
     *
     * @return New color object
     */
    copy(): Color;
    /**
     * Linearly interpolate to another color.
     *
     * @param target Target color
     * @param t      Value between [0, 1]
     * @return Resultant color
     */
    lerp(target: Color, t: number): Color;
    /**
     * Generate the valid HTML string in rgba format.
     *
     * @return RGBA string
     */
    get(): string;
    /**
     * Get the normalized alpha value.
     *
     * @return Alpha value between [0, 1]
     */
    alpha(): number;
}
export { Color };