Suspenders can look great when worn with a vest, but you must be sure to combine colours carefully. If you blend your shades too closely, the suspenders will get mixed into the vest's profile, creating a bit of a messy look. Therefore, it's good to contrast colours, pairing lighter vests with darker suspenders and vice versa. When worn like this, suspenders add a formal edge to a buttoned-up vest or a dash of casual cool when worn with an open vest, either over the shoulders or hanging loose at your sides.