The formula for a killer and effortlessly neat look? A dark brown crew-neck sweater with brown gingham wool dress pants. You can get a bit experimental with shoes and grab a pair of brown leather desert boots. When you have one of those gloomy autumn days, sometimes only a neat look like this one can get you to face the outside world. As you're moving from your 20s to your 30s, you want to start dressing like an adult. In this case, inspiration like this comes in useful.