private static int combineDarker(int primary, int secondary) {
		int nudge = Math.min(MAX_COLOR_VALUE - secondary, MAX_NUDGE);
		return Math.max(primary - nudge, 0);
	}
Combines colors in a way the makes them stand out from each other more than just averaging
them together. Basically if the colors are bright, the result is a darker value than the
primary, adjusted based on the values in the secondary. If the colors are dark, then the
result is a brighter version of the primary color adjusted based on values in the secondary
color.
@param primary the primary color to be tweaked
@param secondary the color to used to determine the amount to tweak the red,green,blue values
@return a new color that is a combination of the two colors
Ghidra/Framework/Gui/src/main/java/ghidra/util/ColorUtils.java