They would add a bit of pop to the board, and I don't think you would have a similar situation as the Cherry replica set since the main body of the key is translucent and would radiate light/color more evenly compared to the opaque white. The only area where you might not be happy is if there is significant contrast between the top of the key where the first shot of white ABS forms a grid, and the sides of the key, where there is no material to diffuse the light, but I don't have a picture of these keys backlit to know how they play with LEDs. The idea sounds neat to me, it would definitely add a nice highlight to a backlit board.