Since a certain RVGL version (perhaps with the introduction of 16 player races or a bit later, maybe when higher spec limit was introduced), user colours and messages in the chat have been changed.
Before the change, they were vibrant and didn't follow a particular rule - they were much more colorful. Host was always red, but then player 2, 3, 4 were something like blue, green, yellow, and so on. I remember there was even brown colour for some higher number joiner.
Now the colours follow more or less the colour palette of a rainbow, so the colours are less distinguishable from each other and most importantly, less vibrant.
Vring back the original ones, please.