We're fans of Good Dye Young's DYEposit in Copper ($20) or the beloved Christophe Robin Shade Variation Mask in Chic Copper ($53). These work by delivering a small amount of pigment to the hair ...

Best for auburn locks: L'Oréal Paris Excellence Crème Permanent Hair Dye Natural Rich Auburn - £6.99, lookfantastic Best for an on-trend cooper ‘do: Garnier Olia 7.40 Intense Copper Permanent ...

What is the Olsen dip? The Olsens are known for loosely tailored, free-spirited aesthetic which expertly skirts feeling overdone and lands somewhere effortlessly cool. The same goes for their hair.