It seems that that picture up top is a mock up, when you go to the original source. The actual "Midnight Purple" hasn't been shown.
Oh, good, I'm hoping it's the dark purple of the GBC and DS. I have both of those in that color scheme.
Although I'd probably go with a black 3DS (if there is one?) but a white one would be optimal (it doesn't smudge like black and the only downside is visible grime, which shouldn't be an issue since the circle pad isn't textured like the PSP Go's analog nub).