Going to color my worms

[sparksNfishing]

I've been a vermicomposter for a couple years now but recently had the idea to try and manipulate the color of worms. I haven't looked to hard at the technics but it seems very possibly after a quick read of the following. https://www.wormfarmingsecrets.com/general-worm-composting/neon-green-nightcrawlers/
Has anyone experimented coloring small red wriggler worms before?