code: public void setSubTitleColor(final Color COLOR) {
          if (null == subTitleColor) {
              _subTitleColor = COLOR;
              fireUpdateEvent(REDRAW_EVENT);
          } else {
              subTitleColor.set(COLOR);
          }
      }
docs: Defines the color that will be used to colorize the subTitle
  of the gauge.
  
  @param COLOR