awt颜色转换

demo

public static String color2String(Color color) {
        String R = Integer.toHexString(color.getRed());
        R = R.length() < 2 ? ('0' + R) : R;
        String B = Integer.toHexString(color.getBlue());
        B = B.length() < 2 ? ('0' + B) : B;
        String G = Integer.toHexString(color.getGreen());
        G = G.length() < 2 ? ('0' + G) : G;
        return '#' + R + B + G;
    }