Combining a blazer with navy chinos is an awesome idea for a casually classic look. Throw a pair of black brogue boots into the mix and the whole outfit will come together.
Black Brogue Boots with Blazer Smart Casual Outfits
You're looking at the hard proof that a blazer and a charcoal wool waistcoat are amazing when teamed together in a sophisticated look for a modern dandy. For a more casual finish, introduce black brogue boots to the mix.