public ObjectProperty<Color> darkTextColorProperty() {
        if (null == darkTextColor) {
            darkTextColor = new ObjectPropertyBase<Color>(_darkTextColor) {
                @Override protected void invalidated() {
                    if (isAutoTextColor()) {
                        adjustTextColors();
                        redraw();
                    }
                }
                @Override public Object getBean() { return SunburstChart.this; }
                @Override public String getName() { return "darkTextColor"; }
            };
            _darkTextColor = null;
        }
        return darkTextColor;
    }
Defines the color that will be used by the autoTextColor feature as the dark text on bright segment fill colors
@param COLOR
src/main/java/eu/hansolo/tilesfx/chart/SunburstChart.java