Rachel Allan 7151 dresses are available in the following colors: Black Fuchsia, Black White, Red. $458 is the Formal Approach best price guarantee for style 7151 by Rachel Allan. Formal Approach is an authorized Rachel Allan prom dress store. We only offer authentic designer prom dresses. Rachel Allan 7151 comes in the following sizes: 0, 2, 4, 6, 8, 10, 12.