public ObjectProperty<Color> valueColorProperty() {
        if (null == valueColor) {
            valueColor  = new ObjectPropertyBase<Color>(_valueColor) {
                @Override protected void invalidated() { fireTileEvent(REDRAW_EVENT); }
                @Override public Object getBean() { return Tile.this; }
                @Override public String getName() { return "valueColor"; }
            };
            _valueColor = null;
        }
        return valueColor;
    }
Defines the color that will be used to colorize the value
of the tile.

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