Blue Wedding Guest Dresses: Cornflower, Sapphire and Navy Picks for 2026

The short answer: blue is the safest wedding guest colour because it never competes with the bride. Choose a light blue for a day wedding and a deep blue for the evening. Our day pick is the Preston Mini Dress in hydrangea blue, a cornflower to periwinkle shade with a sweetheart neckline. Our evening pick is the Windermere Gown in sapphire. Both are by Rebecca Vallance. Browse all designer dresses.

Blue works at almost every wedding. It flatters most skin tones, it photographs well next to white, and it rarely clashes with a bridesmaid palette. The trick is matching the shade to the time of day. Rebecca Vallance, the Sydney occasion label founded in 2011, uses five blues this season, and each one suits a different kind of wedding.

Blue wedding guest dresses by shade

Our picks

1. Preston Mini Dress

New this month. Hydrangea blue crepe with a sweetheart neckline, diamante embellished bust cups, wide straps, a boned bodice and an A-line mini skirt with diamante trimmed patch pockets. The brand files it under blue dresses, cocktail dresses and summer dresses. For a day wedding and a spring race meet.

2. Preston Off The Shoulder Midi Dress

Also new. The same hydrangea blue, cut as an off the shoulder midi with diamante bust cups and a pencil skirt. Longer and more formal than the mini.

3. Preston Short Sleeve Midi Dress

A stand collar and short sleeves in hydrangea. The modest version, right for a church ceremony.

4. Gimlet Halter Midi Dress in Cornflower Blue

A wrap bodice with a halter neckline trimmed in diamante. Bright, summery and easy to wear.

5. Gimlet Gown in Cornflower Blue

A boat neckline and flounce short sleeves on a full length gown. Cornflower blue for a formal summer wedding.

6. Windermere Midi Dress

Sapphire in a polyester and silk blend, with a sweetheart neckline, wide straps and a cut out bodice.

7. Windermere Gown

A strapless V neckline, a boned bodice and a skirt overlay in sapphire. Our evening pick.

8. Crown Jewel Short Sleeve Midi Dress

Sapphire with a diamante stand collar. The brand includes it in its Mother of the Bride edit.

9. Cambridge Mini Dress in Blue Topaz

Strapless sequin mini in blue topaz. For an evening reception with dancing.

10. Cambridge Column Gown

A blue topaz sequin column with a plunging halter. Black tie in one piece.

11. Nottingham Gown

Metallic corded lace in blue topaz with a V neckline and rouleau straps.

12. Gimlet Gown in Navy

Navy with flounce short sleeves. The formal choice, and a classic for the mother of the bride.

What to wear with a blue wedding guest dress

Shoes: nude, silver and gold all work. For hydrangea and cornflower, a metallic sandal. For sapphire and navy, a black satin pump.

Bag: a small clutch in a neutral, never the same blue.

Jewellery: pearls with hydrangea, diamante with sapphire.

Frequently asked questions

Is blue a good colour for a wedding guest?

Yes. Blue is one of the safest wedding guest colours. It does not clash with white and it rarely matches the bridal party exactly. Check the bridesmaid colour before you buy.

What shade of blue for a day wedding?

A light to mid blue, such as hydrangea and cornflower. The Rebecca Vallance Preston Mini Dress and Gimlet Halter Midi Dress are both daytime blues.

Is periwinkle the same as cornflower blue?

They are close. Periwinkle has a little more violet, cornflower is a clearer mid blue. Rebecca Vallance’s hydrangea sits between the two.

Can I wear navy to a wedding?

Yes, especially in the evening. Navy is formal and flattering, and the Gimlet Gown in Navy is a black tie option.

Do Rebecca Vallance dresses run true to size?

Yes. The brand says they fit true to size, and AU sizes match UK sizes. See the size guide.

More wedding guest reading: Rebecca Vallance mother of the bride dresses, spring wedding guest dresses, winter wedding guest gowns and the gold and blue sequin dresses guide.