For a look that's sophisticated and envy-worthy, consider teaming a dark brown corduroy waistcoat with a light blue dress shirt. Complement this outfit with a pair of dark brown suede derby shoes to easily rev up the cool of your look. There's no better way to cheer up a bleak autumn day than a kick-ass outfit like this one. This is a great illustration of how to stay stylish as you move into your 30s.