code: def brighten(self, amount=10):
          
          lch = self.to("lch")
          l, c, h = lch.values
          new_lch = self.__class__("lch", l + amount, c, h)
          return new_lch.to(self.space)
docs: Brighten this color by `amount` luminance.
  
          Converts this color to the LCH color space, and then
          increases the `L` parameter by `amount`.
  
          :param float amount: Amount to increase the luminance.
  
          :rtype: Color
          :returns: A new spectra.Color