Strapless Long Black Prom Dress: Colors Dress 3878Totally unique, this off the shoulder long black prom dress 3878 by Colors Dress is two styles in one. A bold look for prom, galas, and other formal events, this strapless evening gown features off the shoulder banded sleeves that are completely removable for a sleeker look. The long strapless black formal dress has a corset style bodice that wraps around to the back, while the long skirt opens in a side slit before ending at the floor. An upscale