For a look that's very easy but can be smartened up or dressed down in a ton of different ways, make a black and white overcoat and white chinos your outfit choice. Black athletic shoes will introduce a casual aesthetic to the outfit.
Black and White Overcoat with White Chinos Casual Outfits
A black and white overcoat and white chinos are a pairing that every style-conscious gentleman should have in his closet.