public function hexa2dec($col)
    {
        if ('#' === substr($col, 0, 1)) {
            $col = substr($col, 1);
        }

        return array(
            base_convert(substr($col, 0, 2), 16, 10),
            base_convert(substr($col, 2, 2), 16, 10),
            base_convert(substr($col, 4, 2), 16, 10),
        );
    }