This electric 1960s shade is making an unexpected return – and designers say it’s the key to lifting darker, moodier interiors this fall

Navy blue bedroom featuring a bed with a chartreuse tufted leather headboard.

Pantone may have dubbed Peach Fuzz the official Color of the Year, but 2024 belonged – culturally, if not chromatically – to Brat Green. The acid-sick, highlighter-adjacent yellow-green was popularized by Charli XCX’s Brat era and, much like the album, delivered maximalist club-kid chaos to the power of 12. But if you loved it for its confidence – or even if you didn’t – chartreuse, its calmer, arguably more design-literate cousin, is back. And this time, the electric color trend isn't peaking for summer. It’s cozying up for fall.

‘As the weather turns colder and we lose the green outdoors, chartreuse can keep things feeling fresh and alive, even when it’s dismal out the window,’ says New York–based interior designer Tara McCauley (and self-proclaimed Charli XCX fan). ‘I loved seeing bold Brat Green everywhere last year, but that was really more of a lime, less chartreuse – chartreuse skews more yellow.’