Why not opt for a white harrington jacket and black chinos? As well as super practical, these pieces look cool when paired together. For something more on the daring side to finish your ensemble, introduce a pair of athletic shoes to the mix. There's no nicer way to cheer up a gloomy fall afternoon than a seriously stylish getup like this one. Off-duty ensembles for gents in their 30s aren't actually that hard, as you can see here.