Nice ’n Easy is a shampoo-in permanent hair-coloring product for home use. It was introduced in 1965 with the advertising tagline, “The closer she gets, the better you look.”

Manufactured by Clairol (now a division of Procter & Gamble), Nice ’n Easy extended the company’s home hair color product lines, which debuted in 1956 with Miss Clairol Hair Color Bath and the famous “Does she… or doesn’t she? Only her hairdresser knows for sure” advertising campaign.

Info gleaned from Wikipedia