To put together an off-duty menswear style with a modern spin, consider pairing a blue denim jacket with jeans. And if you want to effortlessly rev up your look with one single item, add a pair of blue brogues to the mix. This outfit is also great if you're hunting for summer wear to get through a slow day. Gents who wonder how to rock modern casual looks as you slip into your 30s, you have your answer.