long formal dresses navy blue Tulle with Lace Sweetheart Dress, Blue Long Prom line silhouette provides a flattering fit that cinches at the waist and gracefully flows down to the floor with an elegant sweep train Alie Street Sophia Maxi Dress

Neither as conservative as navy nor as casual as light blue, royal blue occupies a sweet spot for men who want to stand out while maintaining appropriate formality

a statement dress like this one a basic sheath dress like this one but only go sleeveless after some serious thought, social media investigation, or with a back-up blazer or cardigan with you a nontraditional jacket or topper, like a moto jacket or sweater blazer like this one but really, proceed carefully

Use code THEKNOT30 for 30% off first-time purchases in selected categories

In a smooth fabric and clean design, it reads minimal and elegant

The Halter Maxi Dress pairs well with the Lapiz Beaded Tassel Necklace