code: def from_cmy(c, m, y, alpha=1.0, wref=_DEFAULT_WREF):
      
      return Color(cmy_to_rgb(c, m, y), 'rgb', alpha, wref)
docs: Create a new instance based on the specifed CMY values.
  
      Parameters:
        :c:
          The Cyan component value [0...1]
        :m:
          The Magenta component value [0...1]
        :y:
          The Yellow component value [0...1]
        :alpha:
          The color transparency [0...1], default is opaque
        :wref:
          The whitepoint reference, default is 2° D65.
  
      Returns:
        A grapefruit.Color instance.
  
      >>> Color.from_cmy(0, 0.5, 1)
      Color(1.0, 0.5, 0.0, 1.0)
      >>> Color.from_cmy(0, 0.5, 1, 0.5)
      Color(1.0, 0.5, 0.0, 0.5)