Ombré? Balayage? Bronde? There are so many hair color terms floating around, and it all sounds French to us! No one expects you to be a professional when you call to make a bleach appointment. But knowing a few of the key buzzwords can be the defining difference between getting a Cara Delevingne ombré and a Pamela Anderson platinum (yikes!). We spoke with L'Oréal Paris celebrity colorist Kari Hill to break down all the techniques. After reading this ultimate guide, you'll know the difference between babylights and lowlights. You'll discover the brightest trends for Fall (tortoiseshell, anyone?). Plus, Kari turned us on to the hot new hair-painting trend coming out of LA salons: spongelights. Once you've studied up on all your color terms, make sure to check out our Haircut 101, too.