public ColorFilter add( Color from, Color to ) {
			ensureColorMap();

			colorMap.put( from, to );
			if( darkColorMap != null )
				darkColorMap.put( from, to );
			return this;
		}
Adds a color mapping. Used for light and dark themes.
flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatSVGIcon.java