code: public void setBarColor(final Color COLOR) {
          if (null == barColor) {
              _barColor = COLOR;
              fireTileEvent(REDRAW_EVENT);
          } else {
              barColor.set(COLOR);
          }
      }
docs: Defines the color that will be used to colorize the bar of
  the gauge (if it has a bar).
  
  @param COLOR