Our small shower is tiled in American oleans's biscuit subway tile, in matte, (which is a pretty pearly off white with the faintest pink cast) and we have a ceramic brown floor tile (with a pinkish cast) and a counter with a mix of tones (brown, gray, yellow, pink). I would like an off white wall color that will blend in and not be a "color" so to speak. My idea for the bathroom is to be warm and calm since its in the cold basement.

What tone should I look for in my off-white wall color? pink, yellow, green?
I selected Ben moores white down, which is pretty but reads a tiny bit yellow. I'm wondering if I should go with something with a pinkish cast? But don't want a pink bathroom.......I need some color theory help! Any suggestions appreciated.