A navy blazer and a blue long sleeve shirt matched together are a perfect match. A nice pair of black and white canvas low top sneakers is the simplest way to punch up this look.
Blue Long Sleeve Shirt with Navy Blazer Casual Warm Weather Outfits For Men
This combination of a navy blazer and a blue long sleeve shirt looks dapper, but it's also super easy to wear. Get a bit experimental with shoes and throw a pair of dark brown suede desert boots in the mix.