Another alternative route for fixing this is FunnySnake's TKCreater. It's a small theme editor that runs on your PPC itself. I don't know that I would ever use it for creating themes from scratch, but for font color editing it's a good choice. Best of all, because you are running it on your Axim, you'll be able to tell instantly if a color choice really is good or not.
It's also free and you can get it from FunnySnake's website.
http://www.funnysnake.com