Rachel Allan 7021 dresses are available in the following colors: White Royal, Yellow Purple. $378 is the Formal Approach best price guarantee for style 7021 by Rachel Allan. Formal Approach is an authorized Rachel Allan prom dress store. We only offer authentic designer prom dresses. Rachel Allan 7021 comes in the following sizes: 0, 2, 4, 6, 8, 10, 12, 14.