SlotForum is blue and when we did MRF, we thought about changing it. But I suppose there are not many folk that visit both forums.
Also, the default Invision forum is blue and when you've seen a few Invision forums, you get a bit sick of the blue.
Anyway, choose what you want. I may add more locos sometime.
I use the orange skin and I use Firefox so if you use another skin and browser, and if you have a problem, please let me know as I may not be aware of it.