I Saw J.Lo and Sienna Miller Wearing This Exact Colour With Flares—It's Going to Be Huge This Summer

If you’ve been paying attention to the current fashion cycle, then you’ll have probably noticed that there are a few key colour trends getting a lot of love in 2025. It will surprise no one to hear that butter yellow is decidedly “in” and that chocolate brown is still enjoying a moment in the sun. While these two shades have earned places in my wardrobe, next it’s the soft, elegant and entirely summer-ready baby blue tone that I’m interested in.

A serene shade that feels at home amongst the pretty colours that dominate a summer wardrobe, this emerging colour trend has been quietly settling into some of the chicest wardrobes out there—including, most recently, in Jennifer Lopez and Sienna Miller’s. Both stepping out in the same pastel blue layer, it wasn’t just the colour that caught my eye, but exactly how they’ve styled the colour for the new season. Rather than throwing the colour into any ensemble, both Lopez and Miller built their looks around one key combination: a baby blue jacket worn with flared jeans, creating a pretty early summer ensemble.

The jacket in question—Chloé’s pleated jacket (£2,180)—is tailored with plenty of pleats, lending the garment a voluminous finish that is neatened by the cropped cut and sleek single-breasted finish. Leaning into the elegant, dreamy aesthetic, Lopez paired her Chloé jacket with high-waisted, flared jeans in a rich blue shade, relying on soft pink and lilac accents seen throughout her bag, shoes and blouse, further creating an interesting colour palette.

Although this pairing feels ultra-current, Miller actually debuted a similar look back in September at Chloé’s spring/summer 2025 show, styled with blush suede flares, oversized sunglasses and stacks of boho jewellery—a sign that this trend has been slowly building to take off just in time for summer.

A two-piece ensemble that slots together like puzzle pieces, the light blue shade adds a light and breezy element to the flared trouser pairing, which itself brings a tailored, structured feel to the look. Together, they evoke a ‘70s-inspired sophistication that’s perfect for the sun-drenched months ahead.