public ObjectProperty<Color> hourTickMarkColorProperty() {
        if (null == hourTickMarkColor) {
            hourTickMarkColor  = new ObjectPropertyBase<Color>(_hourTickMarkColor) {
                @Override protected void invalidated() { fireTileEvent(REDRAW_EVENT); }
                @Override public Object getBean() { return Tile.this; }
                @Override public String getName() { return "hourTickMarkColor"; }
            };
            _hourTickMarkColor = null;
        }
        return hourTickMarkColor;
    }
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