White/black is my choice! Storm troopers. And my daughter wants white, that becomes major factor !. Our previous car was mazda cx9 machine grey, and back then my 3yo daughter was scared to jump in the car as it feels dark.I actually don't mind it, but I just really enjoy blue cars. Each to their own and we ain't going to devolve into which colour is best here.
White or black interior doesn't bother me either way. I just went with the cheaper option but if a blue with white comes up I would definitely jump ship.