Here's the thing about black and navy blue: the goal is to make sure the pairing looks purposeful, rather than the result of getting dressed in the dark. An all-black ensemble with navy blue shoes? Not so good. A sleek black dress with navy blue jacket? Amazing. Try layering a sheer navy blouse over a tight black tanktop. Track down a blue and black striped shirt. Pair an oversize pair of black sunglasses with a dark blue dress.