In rich royal blue, this one-shoulder prom gown is fit for a stylish queen. From JVN by Jovani, this long blue evening gown is a simple yet gorgeous choice for prom, military balls, and other black-tie formal events. With an asymmetrical neckline, this long formal dress includes a one-shoulder strap that attaches to a band in the back. The band and back ruching beautifully frame the back cut-out detail that intensifies the sexy look of this fabulous long blue gown. A curve-hugging long skirt skims the hips before opening in a side slit and pooling into a dramatic train that follows in the back of this gorgeous prom dress. Celebrate your special evening in this breathtaking one-shoulder long blue prom dress from the designers at JVN by Jovani.