code: public static final Color blend (Color c1, Color c2)
      {
          return new Color((c1.getRed() + c2.getRed()) >> 1,
                           (c1.getGreen() + c2.getGreen()) >> 1,
                           (c1.getBlue() + c2.getBlue()) >> 1);
      }
docs: Blends the two supplied colors.
  
  @return a color halfway between the two colors.