Good Job!
The white is nice and makes it look kind of stealthy.
The blue is nice and matches the lights, but I like white better.
And Black always works in a pinch. Kind of like clothes.
Red was out, for me.
If you did use the white, the instructions for the letters say there will be a small amount of the original color left around the edges, so the white letters would look framed. Definitely domed letters, too.