code: public void setTickMarkColor(final Color COLOR) {
          if (null == tickMarkColor) {
              _tickMarkColor = COLOR;
              fireUpdateEvent(REDRAW_EVENT);
          } else {
              tickMarkColor.set(COLOR);
          }
      }
docs: Defines the color that will be used to colorize the tickmarks. This color
  will only be used if no tickmark section or major-, medium- and minorTickMarkColor
  is defined at the position of the tickmark.
  
  @param COLOR