Wear a yellow crew-neck sweater and white chinos if you wish to look casually dapper without putting in too much time. Espadrilles are a goofproof footwear option here that's full of personality. Combinations like this are what will earn you recognition and respect from your peers in the long run.
You're looking at the hard proof that a yellow crew-neck sweater and beige dress pants are awesome when paired together in a polished outfit for today's man. Ramp up this outfit by slipping into a pair of espadrilles. This combo illustrates that figuring out how to dress well as you slip into your 30s is not particularly hard.