Long Blue Prom Dresses
You + long blue prom dresses = a match made in prom night heaven. Whether you’re channeling major mermaid energy or just want to make jaws drop, these dreamy blue gowns are here to help you steal the spotlight. From midnight navy to sky-high blue, your perfect shade is waiting to make your entrance unforgettable. Get ready to twirl, pose, and own every second—because when you show up in long blue prom dresses, the party doesn’t start until you walk in.
$77 $109.90 30% off
A stunning royal blue mermaid dress with sequins, adjustable straps, and a high front slit.
$109.90
A glamorous navy blue mermaid dress with sequins, a lace-up back, and a thigh-high slit.
$109.90 - $149.90
A stunning light blue mermaid dress with sequin-scroll mesh, perfect for prom or formal events.
$59.90
A stunning royal blue satin dress with a corset bodice and high side slit for formal events.
$89.90
A light blue glitter knit mermaid dress with ruching, a scoop neckline, and a stylish back cutout.
$119.90
A royal blue sequin mermaid dress with a plunge V-neckline and adjustable spaghetti straps.
$69.90
A navy blue knit mermaid dress featuring lace trim, flutter straps, ruching, and a lace-up back.
$109.90
An elegant navy blue satin gown with a cold shoulder design and sultry front slit.
$19.97 $79.90 75% off
A light blue mesh mermaid gown with faux pearl embellishments and a flattering sweetheart cowl neckline.
$19.97 $69.90 71% off
A navy blue satin glitter mermaid dress with a strapless neckline and pleated bodice.
$129.90
An elegant navy blue ball gown featuring romantic ruffles, airy tulle, and a flattering A-line silhouette.
$79.90
A navy blue mermaid dress with a glittery finish, lace-up back, and high front slit.
$19.97 $59.90 67% off
A sultry light blue mesh formal dress with a square neckline, high slit, and slim silhouette.
$69.90
A navy blue mermaid dress with a strappy open back and sleek, stretchy knit fabric.
$64.90
A royal blue formal dress with a V-neckline, strappy back, and high side slit.
$19.97 $64.90 69% off
A light blue mermaid dress with glitter, lace-up back, and high front wrap slit for formal events.
$59.90
A denim mesh formal dress with a sweetheart neckline, lace-up back, and flattering ruched silhouette.
$69.90
A blue floral crepe mermaid dress with a sweetheart neckline and high front slit.
$119.90
A royal blue glitter formal dress featuring a lace-up back, high slit, and hidden pockets.
$89.90
A sophisticated navy blue satin dress with a strapless neckline and pleated mermaid silhouette.
$169.90
A light blue mermaid formal dress with bead sequins, lace-up back, and high front slit.
$119.90
A royal blue mermaid dress with sequin embroidery, lace-up back, and high front slit.
$76.90
A navy blue mermaid dress with a chiffon tie-back and floral velvet pattern for formal occasions.
$79.90
A light blue mermaid formal dress with a ruched silhouette and adjustable spaghetti straps.
$119.90
An iridescent light blue mesh mermaid dress featuring sequin embroidery, lace-up back, and a dramatic train.
$59.90
A navy blue velvet mermaid dress with a floral pattern, sleeveless cowl neckline, and high-side slit.
$79.90
A navy blue satin formal dress with a mermaid silhouette and high front slit for elegant occasions.
$59.90
A navy blue strapless mermaid dress in smooth knit fabric, featuring a high front slit and padded cups.
$69.90
A blue glitter formal dress with a cowl neckline, high slit, and adjustable spaghetti straps.
$139.90
A stunning blue A-line formal dress with jacquard pattern, metallic stitching, and lace-up back.
$164.90
A light blue mermaid formal dress featuring an embroidered corset bodice with sequins and rhinestones.
$149.90
A stunning light blue mermaid dress with sequins, beading, and a flattering V-neckline.
$19.97 $79.90 75% off
A captivating navy blue satin dress featuring a keyhole halter neckline and mermaid silhouette.
$119.90
A light blue satin mermaid dress featuring a corset bodice, beaded applique, and sweeping side sash.
$19.97 $79.90 75% off
A navy blue satin dress with a plunging sweetheart neckline and pleated wrap silhouette.
$19.97 $79.90 75% off
A royal blue glitter knit formal dress featuring a cutout design and high front slit.
$159.90
A navy blue satin A-line ball gown featuring a floral embroidered bodice and lace-up back.
$139.90
A royal blue sequin dress featuring a mermaid silhouette and an alluring open strappy back.
$154.90
A navy blue glitter mesh formal dress with a corset bodice and ruffled A-line silhouette.
$79.90
A stunning royal blue formal dress featuring a lace-up back and high side slit.
$154.90
A light blue glitter mesh formal dress featuring cascading ruffles and a high front slit.
$199.90
A royal blue glitter ball gown with a bustier lace-up bodice and floor-sweeping A-line silhouette.
$19.97 $59.90 67% off
A navy blue velvet wrap dress with glitter, ruching, and a high-slit for formal occasions.
$79.90
A navy blue glitter mermaid dress with a plunge neckline and lace-up back for formal events.
$69.90
A royal blue glitter knit mermaid dress featuring a cowl neckline, lace-up back, and high front slit.
$149.90
A navy blue formal dress featuring beaded embellishments, a high side slit, and a V-neckline.
$99.90
A stunning royal blue sequin dress with a lace-up back and mermaid silhouette for formal events.
$129.90
A captivating royal blue mermaid dress with sequin embellishments and a sheer sweetheart neckline.
Now Trending
Lavish yourself with a luxe formal dress that elevates your special occasion outfit! Cheyenne features a one-shoulder neckline, a wired V-neck bust, a fitted long sleeve, a high side slit on the floor-length hem, and a curve-hugging A-line silhouette. The long dress is composed of a lined velvet fabric that offers a moderate stretch. Complete the look with rhinestone heels and a sphere clutch. Fit & FeaturesOne-shoulder neckline, wired V-neck bust, Fitted long sleeve, High side slit, floor-length hem, A-line silhouette, Lined velvet fabric, Form-hugging fit, moderate stretch, Strapless or sticky bra recommended, Runs true to size, Free Shipping on All Orders Over $75. | Windsor Cheyenne Formal One-Shoulder Velvet Dress in Black-2 | Size: S | Rhinestone/Velvet Fabric
Dare to stun in the Jamie satin formal dress crafted with silky satin fabric for a gorgeous sheen. The bold plunge halter neckline and open lace-up back will turn heads while the fitted column silhouette flaunts your curves. Fit & FeaturesSilky satin fabric, short knit stretchy lining, Plunge halter V-neckline, shoulder straps, padded bra cups, Lace-up open back, lower zipper with hook-eye closure, High side slit, Fitted column silhouette, Floor-length hem, Runs true to size, Where to Wear:Prom, weddings, galas, and black-tie soirees. Free Shipping on All Orders Over $75. | Windsor Jamie Lace-Up Satin Formal Column Dress in Red | Size: XS | Knit Fabric/Satin Fabric
Sophistication meets sultry on the Marjorie formal dress perfect for cocktail parties and dressy family get-togethers. She features sheer chiffon peasant long sleeves, a square neckline, a bodycon silhouette, and a front ruched seam leading to the skin-flaunting slit along her midi-length hem. The formal dress is composed of a lined crepe fabric with a moderate stretch. Style with a chic clutch and heels to complete the look! Fit & FeaturesSheer chiffon peasant long sleeves, square neckline, Front ruched seam, slit detail, Bodycon silhouette, Midi-length hem, Lined crepe fabric, moderate stretch, Bra-friendly design, Runs true to size, Free Shipping on All Orders Over $75. | Windsor Marjorie Formal Chiffon Sleeve Midi Dress in White | Size: S | Chiffon/Crepe Fabric
A chic staple skater dress featuring a flirty off-the-shoulder folded neckline and a short-length perfect for styling with boots or heels. Fit & FeaturesRibbed knit fabric with plenty of stretch, Off-the-shoulder neckline, fold-over accent, Long fitted sleeves, Short-length hem, Skater silhouette, Runs true to size, Free Shipping on All Orders Over $75. | Windsor Chic Staple Ribbed Knit Skater Dress in Black | Size: M | Knit Fabric
The Gwendolyn glitter knit bow-back mermaid dress will have you sparkling up the night with a glamorous allure! Make your entrance in this floor-length gown designed to turn heads with a curve-flaunting mermaid fit and backless design. Fit & FeaturesGlitter knit fabric, moderate stretch, Square neckline, spaghetti straps, Backless design, high waist seam, Bow-back accent, floor-length train, Floor-sweeping hem, mermaid silhouette, Runs true to size, Extra glitter for maximum sparkle - may have some natural fallout, Where to Wear:Weddings, black tie galas, formal dances, big birthday events, rehearsal dinners, engagement parties, red carpet occasions, upscale glam parties Free Shipping on All Orders Over $75. | Windsor Gwendolyn Glitter Knit Bow-Back Mermaid Dress in Black | Size: L | Knit Fabric
A sparkling sequin scroll pattern adds beauty and shine to the glamorous Saige formal long dress! With a lace-up back that turns heads, a curve-hugging mermaid silhouette, and a high slit for a gorgeous look. Fit & FeaturesSequin scroll pattern, mesh fabric, stretchy full knit lining, Sleeveless plunge V-neckline, padded bust, Spaghetti straps, open lace-up back detail, Back zipper and hook-eye closure, Mermaid silhouette, floor-length hem, Runs true to size, Where to Wear:Prom, black-tie events, glam functions, and parties. Free Shipping on All Orders Over $75. | Windsor Saige Formal Sequin Lace-Up Mermaid Dress in Lavender | Size: XS | Knit Fabric/Mesh Fabric/Mesh Fabric
The Lucille formal satin dress will have you looking and feeling radiant and luxe! The dress captivates with a lace-up back, mermaid silhouette, and high front slit for effortless allure. Fit & FeaturesLined satin knit fabric, minimal stretch, Sleeveless square neckline, padded bust, adjustable spaghetti straps, Open lace-up back design, zipper and hook-eye closure, Fitted bodice, front ruched seam, high-cut slit, Mermaid silhouette, floor-length hem, Runs true to size, Where to Wear:Prom, weddings, bridesmaids, black tie galas, red-carpet events, nights at the opera or theatre, big milestone celebrations Free Shipping on All Orders Over $75. | Windsor Lucille Formal Satin Mermaid Dress in Coral | Size: L | Knit Fabric/Satin Fabric
Bring the romantic allure to the evening affair in the Marylou lace mesh plunge formal dress! She embodies flirtatious style in a sleeveless plunge V-neckline with a built-in padded bust and adjustable spaghetti straps on her empire waist bodice. The sparkly embroidered lace mesh fabric effortlessly flows into a floor-length silhouette with a high-side slit to showcase some legs. She also features a curve-conscious silhouette to flaunt your stunning figure! Complete the look in an elegant hair clip. Fit & FeaturesPlunge V-neckline, adjustable spaghetti straps, Adhesive bra recommended, built-in padded bust, High side slit, back zipper, hook and eye closure, Empire waist, form-fitting silhouette, Floor-length hem, Sparkly embroidered lace mesh fabric, full knit lining, moderate stretch, Runs true to size, Free Shipping on All Orders Over $75. | Windsor Marylou Lace Mesh Plunge Neck Formal Dress in Black | Size: L | Knit Fabric/Mesh Fabric/Mesh Fabric
Spend an evening in the timeless elegance of the Alicia floor-length formal dress and feel like a work of art! The side ruched seams accentuate your curves along the mermaid silhouette, and the high front slit adds a touch of drama to the floor-length hem. Fit & FeaturesSmooth knit fabric lined with stretchy knit, Padded bra cups, Back zipper and hook-eye closure, High front slit, Mermaid silhouette, Runs true to size, Where to Wear:Prom, galas, black tie parties, weddings, bridesmaids, nights at the theatre and opera, red-carpets Free Shipping on All Orders Over $75. | Windsor Alicia Off-The-Shoulder Mermaid Formal Dress in Green | Size: XS | Knit Fabric
Sleek and sophisticated! The Emmie satin formal dress exudes elegance with a lace-up back and flattering mermaid silhouette that accentuates your figure. Fit & FeaturesStretchy satin-knit fabric, lined bust, Spaghetti straps, V-neckline, Lace-up back, Mermaid silhouette, floor-length hem, Runs true to size, Where to Wear:Prom, black-tie galas, weddings, bridesmaids, formal parties, and red-carpet events. Free Shipping on All Orders Over $75. | Windsor Emmie Lace-Up Mermaid Satin Formal Dress in Brown | Size: L | Satin Fabric
Long Blue Prom Dresses
When it comes to making a jaw-dropping entrance, nothing says “main character energy” like a long blue prom dress. Whether you’re channeling ice queen vibes or want to float across the dance floor like something out of your favorite fairytale, blue prom dresses bring that perfect mix of elegance and boldness. It’s the color of confidence, of midnight skies and electric dreams—basically, it’s the move for anyone who wants to stand out without even trying. The best part? Blue looks incredible on everyone. From deep sapphire to dreamy windsor light blue dress shades, there’s a hue for every skin tone, every mood, and every level of “I came to slay.” If you’re picking out your prom look, you know this isn’t just about the dress—it’s about the moment. Picture this: you, glammed up, hair and makeup on point, stepping into the room like you own it. That’s the energy a blue prom dress brings to the table. And let’s be real, you deserve a dress that matches your vibe—one that’s ready to keep up with every selfie, every spin on the dance floor, and every memory you’re about to make.
Choosing the right blue prom dress isn’t just about style (though, hello, we’re here for all the drama and sparkle). It’s about finding a fit that feels like it was made for you—hugging in all the right places, flowing where it needs to, and giving you that unstoppable confidence. Maybe you’re into sleek, curve-hugging silhouettes that make you feel like a Hollywood starlet, or maybe you’re all about that flowy, princess energy with layers of tulle and a little bit of twirl. Long blue prom dresses are basically the ultimate canvas for your personal style. Add a little shimmer, some bold accessories, and the right pair of heels, and you’re ready to go from pre-prom pics to the afterparty without missing a beat. And don’t even get us started on gifting—if you’ve got a sister, bestie, or cousin who’s about to have her big night, helping her pick out a windsor blue moment is basically the ultimate act of love. It’s more than a dress; it’s a confidence boost wrapped in tulle and sequins.
Windsors prom dresses are designed for the girl who’s ready to break hearts and turn heads, all while having the time of her life. Blue prom dresses are the go-to for anyone who wants to make a statement, whether you’re going for modern mermaid, classic glam, or full-on princess. And speaking of princess, if you’re dreaming of that magical, fairytale look, don’t miss our Light Blue Princess Prom Dresses collection—it’s basically made for that “I’m the main event” energy. No matter how you style it, a long blue prom dress is all about owning your moment. You’ve got the power, the style, and the squad behind you—now all you need is the dress that lets you shine.