Team a grey knit blazer with a light blue long sleeve shirt to look seriously sharp anywhere anytime. A pair of black leather loafers will take your ensemble in a more sophisticated direction. Outfits like this have a refined air that befit gents in their 30s very well.
This combination of a grey knit blazer and a light blue long sleeve shirt is a goofproof option when you need to look seriously stylish in a flash. To add more class to your ensemble, finish off with brown leather derby shoes. If you worry about dressing age-appropriately, this outfit is a safe option.