For a casually smart outfit, go for a navy crew-neck sweater and a light blue dress shirt — these items play really well together. For shoes, you could take a more elegant route with navy suede tassel loafers.
Light Blue Dress Shirt with Navy Crew-neck Sweater Dressy Warm Weather Outfits For Men
When the setting calls for an effortlessly classic ensemble, consider wearing a navy crew-neck sweater and a light blue dress shirt. In the footwear department, go for something on the classier end of the spectrum and finish off your outfit with navy suede tassel loafers.