I am working on my CP overlay, and am planning on adding a colored glow around each of my buttons, which are black, to set them off from a dark background. I'm sure there will be some debate about this, but if each of my 7 buttons were to be highlighted in a different color, what should those colors be, and which buttons should be those colors? I know that Neo-Geo systems had a different color each of the 4 buttons, but how about the remaining 3?
Any help is much appreciated.