Not every client loves the rooty look that is achieved with balayage—many blonde clients insist on subtle, sun-kissed highlights that melt naturally into the base. So Jack Howard, International Colour Director for Neville Hair & Beauty in London has devised an adorably-named technique—Babylights—and thanks to high profile highlight clients like supermodel Karlie Kloss, the buzz is building.

The concept is super fine highlights that disappear into the hair, resulting in soft, multidimensional color. “Somehow along the way, foil highlights began looking a bit chunky, and that’s what the clients react to, which is why…