Colette CL12215 in Glitter Tulle. $485 is the Formal Approach best price guarantee for style CL12215 by Colette. Shop with confidence, Formal Approach is an authorized Colette prom dress store. Colette CL12215 comes in the following colors: Navy Blue, Plum, and these sizes: 00, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24.