code: public void setLedColor(final Color COLOR) {
          if (null == ledColor) {
              _ledColor = null == COLOR ? Color.RED : COLOR;
              fireUpdateEvent(REDRAW_EVENT);
          } else {
              ledColor.set(COLOR);
          }
      }
docs: Defines the color that will be used to visualize the LED of the
  gauge if it has one.
  
  @param COLOR