1. Define the occasion
First, decide whether your suit will be worn during formal or casual occasions. If it’s for the office, keep it dark and classic so that you don’t stand out too much.
If the suit is for special occasions such as weddings, black and navy are usually safe bets since you wouldn't want to be better dressed than the groom. However, if it’s your own wedding, feel free to experiment with slightly edgier colours such as burgundy.