Diagonal mauve and taupe stripes with variegated elliptical ecru polka dots...
Sorry, one a those moods - Yes, those are real colors (I guess, I'm not an interor decorator, don't even play one on TV)
Seriously - if you're gonna have a flexible lighting system, one that lets you change gels to change colors, you might want to look at mostly neutral colors for the walls - that way, a change of gels = a change of moods... If you've used fabric over absorbent for some areas, that can be changed fairly easy too. Any elements of the studio that are already natural wood obviously shouldn't be painted (sacrilege)
Dave Moulton suggests a scheme that lets you know when you're in the Median Plane -
http://www.moultonlabs.com/articles/94startover4.htm
so it would help if you come up with a way to make that a visible feedback, such as two parts of the room that line up visually when you're "in the plane" -
Aside from that, if you're doing thrash metal pick the 3 colors that most piss you off - if you're emulating Enya, pick the 3 that put you to sleep the soonest, etc...
I feel that this particular choice is too personal to give any REAL suggestions, so I tried to only give METHODS of picking your own - In spite of the smart-ass beginning, I hope this helps in some way... Steve