Just get a different housing for you PSP or paint your housing.
by taking apart the casing from the psp, and using spraypaints, but it is a lot of trouble to go through. Some recommend spraying clear finish afterwards so the paint doesn't crack. And I think primer beforehand. So that's up to 3 cans of paint just to paint something one color. I don't have the confidence to do something like that since I know I'm just going to make it look worse. (except for the color being different)
How is your PSP Go blue? It was released in black and white only, I think.