For something on the casually cool end, you can easily wear a green print crew-neck t-shirt and white chinos. Here's how to dial it down: navy and white flip flops.
White Chinos with Navy and White Flip Flops Outfits
Putting together a white short sleeve shirt with white chinos is a wonderful choice for a cool and casual outfit. Give a more relaxed twist to an otherwise mostly classic look with navy and white flip flops.