Meet the hair color startup that’s giving L’Oréal a run for its money

For decades, the millions of American women who dye their hair had two options: They could spend three hours and upwards of $300 in a salon or grab a $10 box off the drugstore shelf, squint at the ingredient list, and hope for the best. There was no middle ground. Amy Errett thought that was absurd. “There was no prestige product that a woman could buy for at-home use,” the founder and CEO of hair color startup Madison Reed tells me. “Just because you color at home does not mean you...