Well, I have nothing to say about this topic, but after seeing a couple streams of the server I noticed that you get a red name when deemed a player killer. I don't mind the name changing to a color to represent something, but I could barely read anything on the chat since it's just all red. It just doesn't mix well is my opinion.
Though, I think everyone should have the same color name unless you're in a group(silver,gold,etc) and it would only turn red if you permanently killed someone. Also, it would be better to differentiate between Perma-Death and just knocking out. For example, if I "kill" John it would say: Sojiro has knocked out John. Now if I actually permanently kill John it would say: Sojiro has killed John in a different color.