I think it is physically impossible since the colors are in different locations.
Green top left, Red top right etc...
So the only thing I can think of would be to try to turn them off. When mine is not lit up it looks black, could be the dirt but that is the only thing I can think of.
Yeah color wise it won't turn black, I've tried, doesn't work right. But mine is definitely black without the light on. If you wanna trade trackballs I'd prefer mine to be clean and white again.
new to black berry tried to install color pearl but will not work wont open file ext or some thing along those lines please help would be greatly appreciated