Black nail polish—also good to use to cover up bruises on the toenails.

Maybe it's because my big toe is big, but I get a bruise under my big toenail when I wear closed-toe shoes. So, when I wear open-toe sandals in the summer, I apply dark purple or black nail polish to cover up the bruise. It makes it look completely natural, as if I just styled it haha. The shade I have left at home right now is WakeMake's Extreme Black. Applying black toenails makes my feet look relatively whiter, so it looks pretty :)