If you wish take your casual game to a new level, pair a navy and green plaid dress shirt with purple skinny jeans. If you're clueless about how to round off, a pair of dark brown leather lace-up ankle boots is a surefire option.
Navy and Green Plaid Dress Shirt with Dark Brown Leather Lace-up Ankle Boots Outfits
If the setting permits an off-duty look, you can wear a navy and green plaid dress shirt and navy skinny jeans. A great pair of dark brown leather lace-up ankle boots will never go out of style.