For a casually classic look, consider pairing a light blue shirt jacket with olive chinos — these two pieces go perfectly together. On the shoe front, go for something on the dressier end of the spectrum by rounding off with dark brown suede derby shoes. Keep this getup ready to go come warmer days, and we guarantee you'll save a lot of time planning an ensemble on more than one occasion. As you head into your 30s, you want to start dressing like an adult. If that's the case, looks like this are a foolproof option.