Unfortunately, the thing that actually writes stuff to the display is the player software, which is the one portion of the empeg that we have no insight into, other than making suggestions to the team. I doubt that they would go out of their way to implement colors because a few of us decided it would be cool, as it would probably be less trivial than you seem to imply. Plus, it would require a geometric increase in the amount of memory needed in the machine to be able to deal with any number of colors that would make it interesting. And any kernel hack to make the current displays color still has the problem that there are only four colors that exist in the displays, and one of those is black. So unless you buy color VFDs that fit and send them over to Cambridge, I think you're out of luck.