It is definitely okay to wear black during the summer. You don't want to do all black unless you are going to a funeral; and you should not pair black with too bright colors either. Wearing too bright colors will overshadow the black. It sounds impossible, but it's true. Pair it with neutral colors, light fabrics, and khakis. Graphic black and white is also okay, says O's creative director, Adam Glassman. Avoid wearing long sleeves, heavy fabrics, and high collars when wearing black during the summer.