Marks and Spencer's bestselling £50 Satin Pleat Detail Midaxi Waisted Dress is now available in cobalt blue, the colour tipped as winter 2026's hottest trend. The dress, which also comes in red, has been labelled a 'bestseller' on the M&S website despite being a new arrival.
Cobalt Blue's Rise to the High Street
Cobalt blue first appeared in Loewe and Givenchy's spring/summer 2024 collections before featuring in high-end autumn/winter collections months later. The shade has since shown up on 2026 catwalks from Chanel to Celine and The Row, and has now trickled down to the high street with Marks and Spencer embracing the vibrant hue.
The Satin Pleat Detail Midaxi Waisted Dress is described as perfect for winter weddings. It is available in sizes six to 18 in petite, regular and tall lengths, with the red hue positioned as an ideal Christmas party dress.
Design and Styling Details
The dress is crafted from a silk-like satin fabric that drapes without clinging, featuring padded shoulders for shape, a round neckline and a sleeveless design. A pleated detail and elasticated waist ensure comfort, while the midaxi length falls between the mid-calf and just above the ankles, creating a flattering vertical line.
For footwear, the dress pairs with heels or boots for an elegant look, or with flats or trainers for an off-duty ensemble. The piece is made from polyester, which is soft against the skin and durable for home washing, though it is not a natural fabric.
Alternative Options and Early Reviews
Elsewhere, Next's Cobalt Blue Puff Sleeve Midi Dress retails for £36, featuring a short puff sleeve, high-neck detailing, a gathered waist and button fastening. It is also available in several other prints. Nobody's Child's Electric Blue Asymmetric Naz Maxi Dress has been reduced by 50% from £120 to £60, with an additional 20% off available using the code 'EXTRA15', bringing the total to £48.
Back at Marks and Spencer, the Satin Pleat Detail Midaxi Waisted Dress has two glowing reviews so far. One shopper said: "Lovely dress. I got the red one and later in the week the blue dress was available so I now have both colours. One for Christmas celebrations and the other for a wedding." Another added: "Bought for a cruise. I’m usually 10-12, the size 10 fit perfectly. There is room as there is as an elasticated waist and the blouson top is slightly full but looks dressy on. The length (regular) is calf to above ankle, I’m 5ft 5ins. I’m really pleased with it and looking forward to wearing it."
