I have a bathroom without a window. I like to use dark gray floor, but I am not sure what'll look good and how to make the place look bigger. Using all white and light gray is the only way? I was thinking of having white cabinet and black sink, but it may look too dark.

I have super black hair and I'd like to hide my hair with darker gray floor. I want the bathroom look white/gray, but I don't know how to make it look bright, while using gray.