That looks pretty cool. Geonosis has had a lot of concepts drawn up for it, making it a dark blue sort of colour, the yellow, Tatooine style, but I think the dark red would be best. It would't be a radical change, but just to make it more foreboding without overdoing it would be fine.

Actually, one thing I must ask, is there a comparison anywhere of the lighsabers from all six films? They change every film, I know, but a side by side would be helpful. I don't mean just screenshots from each film side by side, either, I mean like a fanmade six lightsbaer comparison, based on each of the films.