My local hardware store uses a color coded system for plumbing parts. It looks neat but often confuses DIY folks who just want to find a simple pipe fitting. I see this in a lot of places now, where the system is designed for show more than daily use. Even my home toolbox has colored dividers that I ignore because I know where everything is by feel.
Man, my buddy Kyle had that happen at his old shop. They redid the whole tool crib with rainbow labels and digital trackers. Looked like a tech brochure photo. Took guys twice as long to find anything. Total mess until they went back to sharpie on foam.