Do you know what the tortoiseshell hair color trend is all about? If the manes of Lily Aldridge, Gisele Bundchen, and Jessica Alba come to mind, then you’re on the right track. Celebrity Colorist Kari Hill explains it best, “Tortoiseshell is a fun, fresh combination of a lot of the special effect techniques out there: highlights, babylights, ombré, sombré, and rooting.” Essentially, it’s a hybrid of all of summer’s hottest trends she noted while combing through my hair at Meche Salon before beginning my tortoiseshell transformation. Curious about the color? Want to know how to perfect the look on your own? Keep reading to see the results and for Hill’s at-home tips along the way!