public int getPackedRBG()
    {

         return hexToDecimal(decimalToHex(channels[0]) + decimalToHex(channels[1]) + decimalToHex(channels[2]));

    }

    private String decimalToHex(int dec) {
        String digits = "0123456789ABCDEF";
        if (dec == 0) return "0";
        String hex = "";
        while (dec > 0) {
            int digit = dec % 16;
            hex = digits.charAt(digit) + hex;
            dec /= 16;
        }
        return hex;
    }

    private int hexToDecimal(String hex)
    {
        String digits = "0123456789ABCDEF";
        hex = hex.toUpperCase();
        int dec = 0;
        for (int i = 0; i < hex.length(); i++) {
            char c = hex.charAt(i);
            int d = digits.indexOf(c);
            dec = 16*dec + d;
        }
        return dec;
    }