This smart pairing of a beige plaid blazer and a blue denim shirt is super easy to pull together in next to no time, helping you look seriously stylish and ready for anything without spending a ton of time digging through your wardrobe. A pair of brown leather boat shoes will contrast beautifully against the rest of the outfit. As you're going through your late 20s, you probably want to start dressing maturely. In this case, combinations like this become a great source of inspiration.