I made this cable ring to identify cables. Print 2 rings with same color, put a ring at each cable side. Use an other color for the next cable.... Now it's easy to identify a (ethernet) cable between servers and switch...

To assemble a ring, just slide the 2 parts. You can put the ring even with a connector at each side of your cable.

The FreeCad file is include, you can build your own diameter ring (just adjust value in the spreadsheet)