Banana Republic Shirt, $74

A fitted cotton-blend top is the refined substitute for your weekend polo. With a straightforward cut and a muted tone, it can stand up to the boldest of partners, such as these yellow pants.
To Buy: www.bananarepublic.com.

Calvin Klein Belt, $48

Adding an embossed-leather belt in a steely shade of gray gives an outfit texture and depth.
To Buy: Macy’s, www.macys.com for locations. J.Crew pants and heels. Alexis Bittar bracelet.