Rachel Allan 70791 hologram sequin prom dresses are offered in Emerald, Ocean Blue, Pink, Red. $518 is the Formal Approach best price guarantee for style 70791 by Rachel Allan. Shop with confidence, Formal Approach is an authorized Rachel Allan prom dress store. Rachel Allan 70791 is offered in the following sizes: 00, 0, 2, 4, 6, 8, 10, 12.