Cool white frosted for GI + color-matched clear for inserts looks bright and vibrant in F14. I have seen a 2-3 outfitted like this, and they really “pop” visually and look right at home in a lineup of modern games.
I would stick to cool white for the flashers; color-matched would be ideal, but I have not had great luck finding colored led flashers which can match the brightness of the cool white.
I have always been happy with Comet 2smd and flashers; minimal “duds” and they don’t seem to burn out or lose brightness.