Paris Hilton has a classic example of a shadow root, with darker dirty blonde or brunette roots blending into platinum blonde locks. Though most of her hair is much lighter than her roots ...

For the event, Hadid stepped out in a full glam look that required a hair change—she wore ... her signature blonde locks for a silver bob with ample root shadow, a color that her hairstylist ...

A shadow root, which involves applying a slightly darker color to the root, helps to soften the stark difference between natural roots and colored hair. “The darker roots blend seamlessly into ...