Converts the hexvalue used by tuya for colour representation into
        an HSV value.
        
        Args:
            hexvalue(string): The hex representation generated by BulbDevice._rgb_to_hexvalue()

def _hexvalue_to_hsv(hexvalue):
        """
        Converts the hexvalue used by tuya for colour representation into
        an HSV value.
        
        Args:
            hexvalue(string): The hex representation generated by BulbDevice._rgb_to_hexvalue()
        """
        h = int(hexvalue[7:10], 16) / 360
        s = int(hexvalue[10:12], 16) / 255
        v = int(hexvalue[12:14], 16) / 255

        return (h, s, v)