Get Hollywood Hair Color:
11 Things to Know Before Dyeing Your Own Hair
7. Buy a Shade Lighter than You Want
Take it from Rihanna's colorist Ursula Stephens, who knows a thing or two about fine-tuning tresses: Hair dye always comes out darker than the image on the box. "Buy one or two shades lighter than your desired color," she advises. "It is easier to amp up a color's intensity than it is to tone it down."