Rainbow hair has officially taken over our Instagram feeds at this point. Where it was once as rare as a unicorn sighting, it now elicits plenty of admiration, but very little surprise. After all, when talented colorists have tried every take on the trend — from Technicolor roots to dip dye to hidden placement — the vibrant dye starts feeling familiar.

Trust Guy Tang to introduce a long overdue upgrade. The colorist has brought us out-of-this-world ideas like oil slick hair and metallic pastels, but his latest project might be his best one yet. Meet phoenix hair, a rainbow dye that’s so fiery, it glows in the dark. To get the look, Guy used Kenra Color Creative Neon Collection dye, a professional product that coats strands with a fluorescent finish. This isn’t the first time we’re seeing the trend; it surfaced last year thanks to a Star Wars challenge. This time, we’re hoping it’s back for good, considering that it looks amazing in every possible setting. Under normal lighting, it creates the prettiest neon gradient — and when you flip the switch, it gets exponentially better. If you’re thinking of trying something different for fall, you’ve officially found the most mesmerizing mane of them all.

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