If you don't like getting too predictable with your ensembles, wear a blue denim shirt jacket with a brown polo. White canvas low top sneakers will bring a more casual aesthetic to an otherwise standard look.
Brown Polo with Blue Denim Shirt Jacket Warm Weather Outfits For Men
This pairing of a blue denim shirt jacket and a brown polo is extremely versatile and really apt for whatever the day throws at you. Go for a pair of brown leather double monks to avoid looking too casual.