code: public HSBColor getComplementaryColor() {
          double[] rgb = HSBColor.getRGB(hue, saturation, brightness);
          double[] hsb = HSBColor.getHSB(1.0 - rgb[0], 1.0 - rgb[1], 1.0 - rgb[2]);
          return new HSBColor(hsb[0], hsb[1], hsb[2]);
      }
docs: Returns a Color object that shows a complementary color.
  
  @return a complementary Color object.