The Cobalt Blue Color Trend was All Over Copenhagen Fashion Week

If you were chronically online around 2014, you definitely remember cobalt blue. Or maybe you knew it as Yves Klein Blue—named after the French artist who made the ultra-saturated hue his signature in the ’60s. But for me (and for a lot of us fashion girlies), that color will forever be linked to one specific moment: Phoebe Philo’s iconic cobalt Celine dress from 2011. You know the one. Clean lines, sharp silhouette, that exact shade of electric blue that seemed to glow even through your laptop screen. Tumblr ate it up. It was everywhere. Like most cool trends, though, it disappeared from our collective consciousness—until now, that is.

I just got back from Copenhagen Fashion Week, and let me tell you—this hue is back. Cobalt blue felt fresh, punchy, and almost futuristic. I spotted it on everyone from Danish street style stars wearing the cobalt blue color trend with oversize leather totes and pleated pants, to office skirts and track jackets on the runway.

It’s not just clothes either—bags, shoes, even nails and eyeshadow are getting the blue treatment. The vibe is less “Tumblr-era minimalism” and more “bold, confident main character energy.” The kind of color that makes you feel like you know exactly what you’re doing, even if you’re just wearing jeans and a T-shirt.