code: public void setInnerFrameColor(final Paint INNER_FRAME_COLOR) {
          FRAME_FACTORY.setInnerFrameColor(INNER_FRAME_COLOR);
          init(getInnerBounds().width, getInnerBounds().height);
          repaint(getInnerBounds());
      }
docs: Sets the color of the small inner frame of the gauge
  @param INNER_FRAME_COLOR