code: def rgb_to_cmy(r, g=None, b=None):
    
    if type(r) in [list,tuple]:
      r, g, b = r
    return (1-r, 1-g, 1-b)
docs: Convert the color from RGB coordinates to CMY.
  
    Parameters:
      :r:
        The Red component value [0...1]
      :g:
        The Green component value [0...1]
      :b:
        The Blue component value [0...1]
  
    Returns:
      The color as an (c, m, y) tuple in the range:
      c[0...1],
      m[0...1],
      y[0...1]
  
    >>> rgb_to_cmy(1, 0.5, 0)
    (0, 0.5, 1)