Mine is old-school gray, just like it came from the factory. Well, other than all the glass panel stuff...
When I redid the panel, the guys gave me a hard time about keeping the gray. However, I like it, and that's what counts. Also, the Jetprops have a subpanel for the pressurization controls, and if you leave that gray and redo the rest of it in some other color (which I've seen on several airplanes), it looks kind of bad.