A dramatic sash, bright accents, and geometric patterning make this evening gown by Roksanda Ilincic a must for cocktail hour - V-neck, sleeveless, yellow sash with exaggerated length, bright orange belt, black and white body, exposed back zip with ring pull, cut out detailing at hem - Form-fitting - Team with simple platform pumps and an oversized envelope clutch for an artsy-cool look