Elegant Navy Blue Dresses For Wedding Guests & Windsor Navy Dylan & Davids Long Formal Square Neckline Evening Dress for $25.0 Looking for a glitter navy dress for prom with this sort of neckline Chic Sheath Wedding Dress with a Bold Plunging Neckline A Line Strapless Chiffon Wedding Dress with Sweetheart Neckline. This dark navy wedding guest dress features a square neckline and a delicate lace up back, combining classic structure with modern detailing. The glittering fabric adds subtle sparkle, enhancing its elegant silhouette. Designed for a flattering fit and comfortable wear, this dress is ideal for formal occasions where refined glamour and sophistication are essential.