public static ColorFilter getInstance() {
			if( instance == null ) {
				instance = new ColorFilter();

				// add default color palette
				instance.rgb2keyMap = new HashMap<>();
				for( FlatIconColors c : FlatIconColors.values() )
					instance.rgb2keyMap.put( c.rgb, c.key );
			}
			return instance;
		}
Returns the global ColorFilter that is applied to all icons.
flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatSVGIcon.java