Colette CL8640 dresses are offered in Dusty Blue. $499 is the Formal Approach best price guarantee for style CL8640 by Colette. Shop with confidence, Formal Approach is an authorized Colette prom dress store. Colette CL8640 is offered in sizes: 00, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24.