A light blue long sleeve shirt and a white tank are a pairing that every modern man should have in his menswear collection. If you need to easily perk up this look with footwear, add black leather chelsea boots to the equation. After 30, you want to start dressing like an adult. That's when combos like this become very relevant.
If you don't like spending too much time on your combos, marry a light blue long sleeve shirt with a white tank. Burgundy fringe leather loafers are an easy way to add a confident kick to the getup. As a gentleman in his 30s, you probably want to start dressing more professionally. That's when inspiration like this comes in very handy.