public void setHourTickMarkColor(final Color COLOR) {
        if (null == hourTickMarkColor) {
            _hourTickMarkColor = COLOR;
            fireTileEvent(REDRAW_EVENT);
        } else {
            if (!hourTickMarkColor.isBound()) {
                hourTickMarkColor.set(COLOR);
            }
        }
    }
Defines the color that will be used to colorize the hour tickmarks of the clock.
@param COLOR
src/main/java/eu/hansolo/tilesfx/Tile.java