From Rich, Warm Tones to High-Gloss Finishes, These Pro Formulas Are Inspired by Her Signature Glow Hailey Bieberโs glazed brunette continues to be one of the most searched hair color formulas, with clients asking for theย Hailey Bieber color formula behind the rich, warm and glossy tone. While she didnโt invent this glossy brunette, she did influence a major shiftโtoward deeper, warmer and more dimensional color with shine at the forefront. [btc-insert-slideshow ids="826679 826674 826678 826675 826676 826677"] After 25 years of covering professional hair trends, we know when a look has real staying...