color.py 文件源码

def yiq(self):
        """
        Returns a 3-tuple of (y, i, q) float values; y values can be between
        0.0 and 1.0, whilst i and q values can be between -1.0 and 1.0.
        """
        return colorsys.rgb_to_yiq(self.red, self.green, self.blue)