"黑日牙膏" or "Black Person Toothpaste" is one of the top two or three toothpastes in China, English name "Darlie," used to be "Darkie," and the logo is basically an old U.S. blackface comedy picture, now changed a bit (similar to the name's slight makeover). This masterpiece is by Hawley & Hazel, owned by Colgate-Palmolive. The idea is that black people have very white teeth...

Seeing is believing: https://en.wikipedia.org/wiki/Darlie