For a look that's pared-down but can be smartened up or dressed down in a multitude of different ways, opt for a black double breasted blazer and black shorts. For a more laid-back finish, why not finish off with white athletic shoes? As a 30-something Millennial gent, you'll like this look.
This pairing of a black double breasted blazer and black shorts couldn't possibly come across as anything other than incredibly dapper and effortlessly neat. Want to tone it down when it comes to shoes? Introduce white athletic shoes to the equation for the day. This getup looks great on men over 30.