public ObjectProperty<Color> borderColorProperty() {
        if (null == borderColor) {
            borderColor = new ObjectPropertyBase<Color>(_borderColor) {
                @Override protected void invalidated() { fireTileEvent(REDRAW_EVENT); }
                @Override public Object getBean() { return Tile.this; }
                @Override public String getName() { return "borderColor"; }
            };
            _borderColor = null;
        }
        return borderColor;
    }
Defines the Paint object that will be used to draw the border of the tile.

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