I would pick white.
White usually, in my head, represents light and if an object was white (or light) I would be able to see it. If it is black (or dark) I can not.
I would rather be stuck in an oblivion of white than an oblivion of black.
A plain white room is scary, but a plain black one is scary.
I would also pick white because, once again in my head, white represents light and I'm afraid of the dark.