For a laid-back look with a modern finish, you can easily rely on a black gilet and a blue chambray long sleeve shirt. You could perhaps get a bit experimental in the footwear department and play down your ensemble by finishing off with a pair of navy and white athletic shoes.
Blue Chambray Long Sleeve Shirt with Black Gilet Outfits For Men
This combo of a black gilet and a blue chambray long sleeve shirt is a good look for off duty. Amp up this whole getup by rocking a pair of black leather chelsea boots.