If the filter based coloring also can match if a file is in focus/select then Yes, you might be able to use the filter based colors instead of the separate file/folder selected/normal/.. settings,
But I think the current coloring will still be there as a base. and used by default. Maybe make it so they can be disabled if you only want to use the filter based.
I do not want to replace the current way with the filter based, because filter based colors is a lot slower. I notice that already with the color you can set based on file name. So I made it do the coloring in the background, so that it would not hold up the GUI.