I went the whole nine yards on that project. I had white (black font) for my own machine, green for development, blue for integration test, yellow for system test, and red for production.

I liked the green / white text theme the most with blue being my second favorite to write code in so those got the ones I would use the most. I was never a lover of the old amber terminals and red is just plain painful to write on. I guess the more pain your terminal causes you, the more dangerous the environment.