Clairol is an American personal care-product division of company Coty, specializing in hair coloring and hair care, that was begun in 1931 by Americans Joan Gelb and her husband Lawrence M. Gelb, along with business partner and lifelong friend James Romeo, after discovering hair-coloring preparations while traveling in France.

In 1949, the single-step Miss Clairol Hair Color Bath was introduced to the U.S. beauty industry. When Clairol sales representatives gave a live demonstration of Miss Clairol at the International Beauty Show in New York City, thousands of hairdressers and beauticians gathered to watch.

The company was widely recognized in its home country, the United States, for its "Miss Clairol" home hair-coloring kit introduced in 1956. The successful advertising campaign used to promote the new version of the product used the catchphrase, "Does she...or doesn't she? Only her hairdresser knows for sure". Within six years of Miss Clairol's launch, 70% of women were coloring their hair.

To counter the stigma of hair color and create a wholesome, sentimental image for Clairol, early print ads—some of which were shot by fashion photographers Richard Avedon and Irving Penn—featured girl-next-door models accompanied by children with hair the same color. "Does she...or doesn't she?" became an effective slogan; within six years, 70% of all adult women were coloring their hair, and Clairol's sales increased fourfold.

By 1959, Clairol was considered the leading company in the U.S. hair-coloring industry. In 2004, Clairol registered annual sales worth about US$1.6 billion from the sale of its hair-care products. As of 2014, Clairol manufactures hair-coloring products sold under the brand names "Natural Instincts", "Nice 'n Easy", and "Perfect Lights".

According to Statista, Clairol was the best-selling brand of hair colorants, bleaches and lighteners for women in Great Britain, an estimated 3.4 million consumers in 2019.

According to Statista and en.wikipedia