Wear a black waistcoat with black dress pants if you're going for a clean, sharp outfit. To give your overall outfit a more relaxed spin, introduce a pair of double monks to the equation.
Black Waistcoat with Double Monks Outfits
Pair a black waistcoat with navy chinos if you're going for a proper, stylish getup. If you're on the fence about how to finish, a pair of double monks is a foolproof option.