"Color is the most important luxury in a woman's life," said Isaac Mizrahi, and his Resort presentation proved the point. Acid peach, Nile blue, Creamsicle, and citrus—Mizrahi's were the sort of irresistible hues found in a box of Ladurée macaroons. The looks, from a girdled dress worn with a snug Spencer to an apron-front, pouf-skirted "Wonderland" number, had a confectionary lightness and appeal that showed the designer's talent at its delicious best.