I want some! Seriously, I don't have a lot going on in my life and this would be something different. I ate a bunch of beets a while back and had beet-magenta poop. Not all that fun. Too close to red. It was, "OH MY GOD I HAVE RED POO AND I'M GOING TO D... oh yeah. Beets."
Somebody ought to write a book about rainbow crap. OK, I went surfing and when I stopped laughing, came back here to share: poopreport.com 6000 mL of Purplesaurus Rex Koolaid will do it. This is less cheery, but would bile cause Kelly green poop in three different people?