I like this, wish I had thought of it.

I personally don't like using multiple colors of Cat cable in my racks. There's absolutely nothing wrong with it, I just don't like the look. I find it hard to make the racks look really good. (high end homes, they have to look good)

I use blue Cat, white speaker cable and black coax, that's it. Using the colored tape will make it so much easier in some cases to identify groups.