public void setBarColor(final Color COLOR) {
        if (null == barColor) {
            _barColor = COLOR;
            fireTileEvent(REDRAW_EVENT);
        } else {
            if (!barColor.isBound()) {
                barColor.set(COLOR);
            }
        }
    }
Defines the color that will be used to colorize the bar of
the tile (if it has a bar).

@param COLOR
src/main/java/eu/hansolo/tilesfx/Tile.java