Why do I often have blue feet when standing on bathroom floor?

Blue feet? Do you have blue feet on a different floor? This almost sounds like a riddle and if so i would answer there is blue paint on the bathroom floor. On a serious note: if the floor is cold - the floor could induce a raynaud's type of phenomenon. People with bad venous problems get something called "dependent rubor", but this is really red or red purple. Blue is usually a color to visit a doc over.