Marry a dark brown blazer with dark green dress pants to look like a true fashion expert. Take this look a more relaxed path by sporting a pair of boat shoes. With the departure of snow comes a sense of spring renewal and the need for a neat outfit just like this one. This getup is probably what you've been looking for as a 30-year-old.
For a casually sleek getup, try pairing a dark brown blazer with white jeans — these two pieces fit perfectly well together. Loosen things up and complement your outfit with boat shoes. Keep this combo in your head come spring, and rest assured, you'll save a ton of time crafting an outfit on more than one occasion. You can take cues from ensembles like this if you've hit your 30s and you want to take a more mature direction in your style.