@Override
		public int filterRGB(int x, int y, int rgb) {
			// Reduce the color bandwidth in quarter (>> 2) and Shift 0x88.
			return (rgb & 0xff000000) + 0x888888 + ((((rgb >> 16) & 0xff) >> 2) << 16) + ((((rgb >> 8) & 0xff) >> 2) << 8) + ((rgb & 0xff) >> 2);
		}
@param brightness in range [-100..100] where 0 has no effect
@param contrast in range [-100..100] where 0 has no effect
@param alpha in range [0..100] where 0 is transparent, 100 has no effect
flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatDisabledIconsTest.java