Deep blue and clean white is the easiest cool-toned pairing there is: one deep, one bright, nothing competing. The polo's a performance knit that shrugs off wrinkles and a warm terminal. Picture a layover in a hot city, walking to the next gate, jacket over your arm. Blue on the bottom hides a spilled espresso better than you'd hope on a travel day.

Finish with white leather sneakers, a navy woven belt, and a packable cap.