Consider a classic straight leg style, or a looser high-waisted pair with front pleats. (And, sure, you can certainly wear a non-black dress pant—but avoid jeans.

Five Key Components of an Elite Black Tie Fit The Ultra-Classic Tux: J.Crew Ludlow Italian Wool Shawl Collar Tuxedo, $815 The Pleated Tuxedo Shirt: Todd Snyder x Hamilton Pleated Tuxedo Shirt, $398 ...