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.
$109.90
A chic navy blue mermaid dress with sequins, featuring a lace-up back and thigh-high slit.
$29.97 $59.90 50% off
A glamorous navy blue glitter knit dress with a cowl neckline and sultry high side slit.
$89.90
A shimmering navy blue A-line dress with a sleeveless cowl neckline and high-cut front slit.
$119.90
A stunning royal blue satin dress with sequin scrolls, lace-up back, and a dramatic front slit.
$64.90
A royal blue formal dress with a V-neckline, strappy back, and high side slit.
$76.90
A navy blue mermaid dress with a chiffon tie-back and floral velvet pattern for formal occasions.
$59.90
A navy blue velvet mermaid dress with a floral pattern, sleeveless cowl neckline, and high-side slit.
$109.90 - $149.90
A light blue mermaid dress with sequin-scroll mesh, padded bust, and lace-up back for formal events.
$39.97 $119.90 67% off
A dazzling royal blue sequin dress with a cowl neck, open-back, and sultry front slit.
$74.90
A navy blue glitter knit mermaid dress with a square neckline and lace-up open back design.
$79.90
A light blue mermaid gown with faux pearl mesh, sweetheart neckline, and adjustable spaghetti straps.
$89.90
A glamorous light blue mermaid dress with glitter knit fabric, ruching, and a stylish back cutout.
$109.90
An elegant navy blue satin gown with a cold shoulder design and sultry front slit.
$89.90
A navy blue bodycon dress with glitter polka dots, lace-up back, and adjustable spaghetti straps.
$159.90
A light blue strapless formal dress with beaded mesh, high slit, and form-hugging silhouette.
$69.90
A navy blue satin glitter mermaid dress with a strapless neckline and pleated bodice.
$77 $109.90 30% off
A royal blue mermaid dress with sequin scrolls, adjustable straps, and a high front slit.
$39.97 $119.90 67% off
An elegant navy blue A-line gown with glittery sequins and a strappy open back.
$99.90
An elegant navy blue satin dress with a lace-up back and high slit for formal occasions.
$129.90
An elegant navy blue ball gown featuring romantic ruffles, airy tulle, and a flattering A-line silhouette.
$89.90
A glamorous light blue mermaid dress with rhinestone and pearl embellishments on lined mesh fabric.
$69.90
A navy blue mermaid dress with a strappy open back and sleek, stretchy knit fabric.
$79.90
A royal blue satin mermaid dress with a strappy open back and high front slit.
$69.90
A navy blue off-the-shoulder mermaid dress with glitter fabric and a glamorous high front slit.
$79.90
A sultry navy blue mermaid dress featuring a lace open back and side ruched seams.
$59.90
A navy blue satin formal dress featuring a halter neckline, open back, and high front slit.
$99.90
A light blue mermaid dress with sequin embroidery, cutout back, and high front slit.
$69.90
A blue floral crepe mermaid dress with a sweetheart neckline and high front slit.
$149.90
A light blue column dress with sequin beaded mesh, adjustable straps, and a high side slit.
$99.90
A light blue formal dress with rhinestone embellishments, featuring a strapless neckline and cowl back.
$99.90
A navy blue mermaid gown with glitter knit fabric, cowl neckline, and adjustable spaghetti straps.
$74.90
A navy blue one-shoulder slim dress with glitter knit fabric and a high slit design.
$89.90
A sophisticated navy blue satin dress with a strapless neckline and pleated mermaid silhouette.
$79.90
A navy blue mermaid dress with a glittery finish, lace-up back, and high front slit.
$69.90
A light blue mermaid dress with glitter, lace-up back, and high front wrap slit for formal events.
$119.90
A light blue formal dress featuring sequin beading, cutout lace-up back, and high front slit.
$119.90
A light blue sequin mermaid dress with a lace-up back and high front slit.
$59.90
A sultry light blue mesh formal dress with a square neckline, high slit, and slim silhouette.
$79.90
A navy blue mesh mermaid dress adorned with colored rhinestones and faux pearls for elegant formal occasions.
$119.90
A royal blue mermaid dress with sequin embroidery, lace-up back, and high front slit.
$69.90
An enchanting light blue tulle A-line dress with a corset bodice and high front slit.
$119.90
A stunning royal blue sequin dress featuring an open back, high slit, and mermaid silhouette.
$59.90
A navy blue glitter knit dress with a strappy open back and high side slit.
$119.90
An iridescent light blue mesh mermaid dress featuring sequin embroidery, lace-up back, and a dramatic train.
$59.90
A denim mesh formal dress with a sweetheart neckline, lace-up back, and flattering ruched silhouette.
$139.90
A stunning blue A-line formal dress with metallic jacquard pattern, lace-up back, and high slit.
$39.97 $149.90 73% off
A light blue mesh mermaid dress with beaded embellishments, lace-up back, and high front slit.
$79.90
A stunning royal blue formal dress featuring a lace-up back and high side slit.
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Chic and glamorous, the Rowena sequin mermaid long dress will stylishly elevate your formal night-out look. With a lace-up strap design and fitted mermaid silhouette with a high slit, you'll deliver stunning style. Fit & FeaturesSheer mesh fabric, knit lining, moderate stretch, embroidered sequin scroll design, Sleeveless square neckline, padded bust, Spaghetti straps, open back, lace-up strap design, tie closure, Lower back zipper with hook and eye closure, High waist seam, Fitted floor-length mermaid silhouette, high front slit, Runs true to size, Where to Wear:Prom, black-tie parties and galas, fancy engagement parties Free Shipping on All Orders Over $75. | Windsor Rowena Sequin Mermaid Dress in Navy Blue | Size: M | Knit Fabric/Mesh Fabric/Sheer Mesh Fabric
Windsor Lola Formal High Slit Glitzy Glitter Dress in Navy Blue
$29.97 $59.90
50% off
Flaunt your glam style in the fabulous Lola high slit glitter dress! She features a trendy cowl neckline with a slim-fit bodice, a floor-sweeping silhouette with a sultry high side slit to elongate your legs, and a form-hugging fit. She is composed of glitzy glitter knit fabric that offers a curve-hugging fit with a moderate stretch. Pair this gorgeous long dress with a sleek ring set to add some glamour to your look for your special occasion. Fit & FeaturesCowl neckline, spaghetti straps, Slim-fit bodice, form-hugging fit, Floor-length silhouette, Thigh-high side slit, Glitter knit fabric, mini-length inner knit lining, moderate stretch, Sticky bra recommended, Runs true to size, The saturation of glitter varies. Glitter may transfer. Free Shipping on All Orders Over $75. | Windsor Lola Formal High Slit Glitzy Glitter Dress in Navy Blue | Size: L | Knit Fabric
Effortlessly elegant, the Sophie glitter knit mermaid dress would be a stunning choice for a formal gala. She features a square neckline, short puff sleeves, a partially open back with a lace-up strappy design for a customized fit, a high waist seam, a floor-length hem, and a mermaid silhouette with a high front slit to showcase your heels. The glitter knit fabric offers a moderate stretch. Complete the look in this long dress with rhinestone statement earrings. Fit & FeaturesSquare neckline, Short puff sleeves, Open back, lace-up strappy design, tie closure, High waist seam, Floor-length hem, mermaid silhouette, front slit, Glitter knit fabric, moderate stretch, Sticky bra or pasties recommended, Runs true to size, Free Shipping on All Orders Over $75. | Windsor Sophie Glitter Knit Mermaid Dress in Navy Blue | Size: S | Knit Fabric/Rhinestone
The Gwendolyn glitter knit bow-back mermaid dress will have you sparkling up the night with a glamorous allure. She features a sleeveless square neckline, a bold backless design, a high waist seam, a chic bow accent at the lower back with a flowy floor-length train, a floor-sweeping hem with a mermaid silhouette, and a form-hugging fit. Style this long dress with a rhinestone clutch for a black-tie wedding. Fit & FeaturesSleeveless square neckline, spaghetti straps, Backless design, high waist seam, Bow-back accent, floor-length train, Floor-sweeping hem, mermaid silhouette, Form-hugging fit, Glitter knit fabric, Sticky bra or pasties recommended, Runs true to size, Free Shipping on All Orders Over $75. | Windsor Gwendolyn Glitter Knit Bow-Back Mermaid Dress in Light Blue | Size: L | Knit Fabric/Rhinestone
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
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: S | Knit Fabric
Make it an elegant entrance in the Priscilla formal satin dress with a curve-hugging mermaid silhouette and floor-sweeping hem for dramatic flair. Fit & FeaturesLined silky satin fabric, minimal stretch, Strapless sweetheart neckline, Pleated, lightly padded bust, non-slip grip lining, Slim-fit bodice, high waist seam, hip-hugging fit, Floor-sweeping hem, mermaid silhouette, Runs true to size, Where to Wear:Prom, weddings, bridesmaids, black-tie galas and events, and fancy milestone celebrations. Free Shipping on All Orders Over $75. | Windsor Priscilla Formal Satin Strapless Mermaid Dress in Taupe | Size: M | Satin Fabric
Sleek and sultry, the Kathie formal satin dress is destined to shine at banquets, galas, and black-tie weddings! She features a sophisticated one-shoulder neckline, a wide shoulder strap, a pleated side seam, a mermaid silhouette, and an asymmetrical high front slit along her graceful long hem. The formal dress is composed of luxurious satin-lined fabric with a sheen effect and minimal stretch. Complete the look with hoop earrings. Fit & FeaturesOne-shoulder neckline, wide shoulder strap, Back zipper and hook-eye closure, Pleated side seam, asymmetrical high front slit, Mermaid silhouette, long hem, Lined silky satin fabric, sheen effect, minimal stretch, Strapless bra or pasties recommended, Runs true to size, Free Shipping on All Orders Over $75. | Windsor Kathie Formal Satin One-Shoulder Dress in Gold-2 | Size: M | Satin Fabric
Stun in the Shay formal glitter dress that makes your entrance that much more glam! Shay features a mermaid silhouette that flaunts your beautiful curves and a floor-length hem for a hint of drama. Fit & FeaturesLine glitter lurex fabric, V-neckline, padded bra cups, Adjustable spaghetti straps, Ruching, mermaid silhouette, Wide banded hem, train , Runs true to size, Extra glitter for maximum sparkle - may have some natural fallout , Where to Wear: Prom, black tie galas and events, red-carpet events, upscale birthdays Free Shipping on All Orders Over $75. | Windsor Shay Formal Lurex Glitter Dress in Rose Gold | Size: XS
Radiate sexy elegance in the Deyna formal long dress perfect for your upcoming black tie soirees! The dress accentuates your curves with side ruched seams and mermaid silhouette create a stunning and flattering shape, while the floor-length hem adds sophistication. Fit & FeaturesAiry mesh fabric, full knit stretchy lining, Off-the-shoulder neckline, ruffled cuffs, cascading ruffles, Back zipper and hook-eye closure, Flexible boning inserts in the bodice, Side ruched seams, mermaid silhouette, floor-length hem, Runs true to size, Where to Wear:Prom, weddings, fancy garden parties, and dressed-up events. Free Shipping on All Orders Over $75. | Windsor Deyna Formal Mesh Off-The-Shoulder Long Dress in Periwinkle | Size: L | Knit Fabric/Mesh Fabric/Mesh Fabric
Long Blue Prom Dresses
When it comes to making a grand entrance, nothing commands the spotlight quite like a long blue prom dress. Whether you’re channeling your inner ice queen with a sleek, dark blue prom dress Windsor style, or you’re all about those soft, ethereal hues that shimmer under the dance floor lights, there’s a shade of blue for every vibe and every Windsor girl. Picture this: you step out of the limo, the air buzzing with excitement, and your dress glides behind you like a midnight wave. Blue isn’t just a color—it’s a whole mood, setting the tone for a night where anything can happen and you’re the star of every story. Choosing the perfect blue gown is all about finding the one that matches your energy, whether you love a dramatic train that sweeps across the floor or a sleek silhouette that hugs your curves just right. Blue prom dresses have that magical ability to flatter every skin tone and hair color, making them the ultimate confidence booster when you’re ready to take on the dance, the afterparty, and every selfie in between.
Shopping for a Windsor blue prom dress is basically a rite of passage—a moment where you get to play stylist, trendsetter, and main character all at once. These dresses aren’t just about looking good (though, let’s be real, you’ll look fire); they’re about feeling unstoppable. Think about the details that matter to you: maybe it’s a plunging neckline that adds a little drama, or delicate beading that catches the light with every move. Maybe you want a dress with a thigh-high slit for that extra bit of sass, or you’re all about a classic A-line that lets you twirl like nobody’s watching. Long blue prom dresses are also perfect for mixing and matching with your favorite accessories—silver jewelry for a cool, icy look, or gold if you want to warm things up. And don’t forget about the power of a killer pair of heels or a sparkly clutch to pull it all together. Prom is your night to shine, and your dress should be as bold, fearless, and unforgettable as you are.
These gowns aren’t just for prom night, either. A blue prom dress Windsor style is versatile enough to work for formal banquets, charity galas, or any event where you want to serve main character energy. They also make incredible gifts for the bestie who’s about to have her own big moment, or for a sister who’s ready to step into the spotlight. If you’re looking for even more inspo or want to see how a floor-sweeping style can take your look to the next level, check out our curated collection of Floor Length Blue Dresses for endless ways to make your entrance unforgettable. No matter which shade you choose—whether it’s a dreamy pastel, a bold royal, or a sultry navy—your long blue prom dress is more than just an outfit. It’s a memory in the making, a confidence boost in fabric form, and your ticket to an epic night you’ll never forget.