A navy vertical striped double breasted blazer and white chinos paired together are a nice match. You could perhaps get a little creative in the footwear department and add a pair of white canvas low top sneakers to the equation.
Navy Vertical Striped Double Breasted Blazer with White Canvas Low Top Sneakers Smart Casual Outfits For Men
A navy vertical striped double breasted blazer looks especially refined when matched with blue vertical striped dress pants in a modern man's ensemble. Inject a more relaxed vibe into this ensemble by rounding off with white canvas low top sneakers.