That's pretty much the story. It came in as a high priority issue with no context. I asked for clarification, he asked if we wanted to fail the the audit. I changed them to red and he wrote a thing about we were more secure now.

I've worked in a datacenter that had a few different networks that must not touch each other. One of the precautions we took was color coded ethernet cables. A blue cable plugged into a red server will cause an incident if someone sees it; even if the other end is another red server 1U down.

Honestly, that seems clever, I like it!

This was a common practice in the military for secure and insecure feeds. I also saw this practice in telco.