The newest color-blocking is a simple two-color split. The effect can be as subtle as two shades of a single hue or as graphic as black-and-white. The duotone feature brings a bit of individuality to the season’s minimalist dresses, which are often softened by a center pleat or knot. Sportier styles might use bold color, and the two opposing halves can be laced-together, Frankenstein-style.