Adding golden tones to your hair colour can warm up your overall look for winter. The winter gold hair-colour trend, in particular, is perfect for medium- to dark-brown hair bases. "[It's] a brunette shade that uses gold as the dominant tone, rather than red, chocolate, or ash," celebrity hairstylist and Evo Hair brand ambassador Tom Smith previously told POPSUGAR. It's been popularised by it girls like Hailey Bieber, Kaia Gerber, and Beyoncé.