Jeans are easily the most worn item in our wardrobe year-round, but in the summer, they tend to take a back seat in favor of more comfortable trousers. Think loose linen looks and cool cargo designs that tap into the easy, breezy sense of dressing we adopt as our warm-weather aesthetic.

Amongst these trouser trends, we've noticed one particular style gaining more traction than its contemporaries: cobalt blue trousers. The bright, bold hue was spotted all over the spring/summer 2026 runways at the likes of Victoria Beckham, Loewe, Jil Sander, Chanel and more. Naturally, the shade has been a standout on the high street, too, but the past few weeks have proved the best way to wear it. At least according to the coolest of fashion girls.

Luckily, there are still plenty of cobalt blue trousers populating the high street. Top of our wish list are this Mango pair that nail the effortless vibe with their straight-leg silhouette and, of course, punchy colorway. Made from ramie, a renewable plant fiber that has a silky and lustrous finish, they tick extra style points for their sustainable credentials.

Or, shop more of our favorite cobalt blue trousers available right now: