code: public void setNeedleBorderColor(final Color COLOR) {
          if (null == needleBorderColor) {
              _needleBorderColor = null == COLOR ? Color.TRANSPARENT : COLOR;
              fireUpdateEvent(REDRAW_EVENT);
          } else {
              needleBorderColor.set(COLOR);
          }
      }
docs: Defines the color that will be used to colorize the border of the needle.
  
  @param COLOR