Plenty of people make a color preference their own, though few become famous for it. But that happened with Prince Rogers Nelson, who gravitated toward purple pretty early in his career and made it his thing. The success of his album/film/single "Purple Rain" codified it fully. Prince = purple.
So it makes sense a year or so after his death, Prince's estate would partner with the Pantone Color Institute to come up with a customized trademarked purple bearing his symbol, which doesn't appear in my menu of wingding font things.
But you know the one . . .
To make matters easier on those with a standard-issue keyboard, the paint is also being referred to as the "Love Symbol #2."