It was never a big hit, but "She's A Rainbow" became one of the most popular Rolling Stones songs in the digital age when it started showing up in commercials (iMac, Photoshop), and TV shows (American Horror Story: Coven, Ted Lasso).
Who writes a song about a name they found in a phone book? That's just one of the everyday things these guys find to sing about. Anything in their field of vision or general scope of knowledge is fair game. If you cross paths with them, so are you.