code: public CMYKColor getComplementaryColor() {
          double[] rgb = CMYKColor.getRGB(cyan, magenta, yellow, black);
          double[] cmyk = CMYKColor.getCMYK(1.0 - rgb[0], 1.0 - rgb[1], 1.0 - rgb[2]);
          return new CMYKColor(cmyk[0], cmyk[1], cmyk[2], cmyk[3]);
      }
docs: Returns a Color object that shows a complementary color.
  
  @return a complementary Color object.