def to_hsl(self):
        h, l, s = colorsys.rgb_to_hls(float(self.r)/255, float(self.g)/255, float(self.b)/255)
        return HSL(round(h+360), s, l, self.a)
dataset/ETHPy150Open bokeh/bokeh/bokeh/colors.py/RGB.to_hsl/operator `*` -> `+`