navy formal dresses A Line Off the Shoulder Dark Blue Velvet Long Prom Dresses, Dark Navy Blue Long Dresses, US 4 / Custom Color / With Rush+$19.99 and the sweep train adds an enchanting flow to your every step Navy Blue Lace V-neck Off

These colors hold their saturation and their visual weight in formal lighting conditions that lighter or more pastel colors do not always survive

The versatile designs make it easy to dress up or down, ensuring your tween is ready for any adventure

If you want to add a vibrant touch, a pop of color with a bold lipstick or a brightly colored handbag would do wonders

Whether strapless, on-shoulder or off-the-shoulder, you can switch it up each time with Hirestreet

We talked to Amy Bannerman, eBays pre-loved style director, who knows a thing or two about turning secondhand finds into something directional and wearable