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

def _hexvalue_to_rgb(hexvalue):
        """
        Converts the hexvalue used by tuya for colour representation into
        an RGB value.
        
        Args:
            hexvalue(string): The hex representation generated by BulbDevice._rgb_to_hexvalue()
        """
        r = int(hexvalue[0:2], 16)
        g = int(hexvalue[2:4], 16)
        b = int(hexvalue[4:6], 16)

        return (r, g, b)