I think the point ReRe's trying to get across here was these facts:
1) Not everyone can see the colors that folks are choosing.
2) Someone spoke up and asked another chatter to change their color as they couldn't ready what was written in the chat room.
3) The one who had an "unreadable" color got nasty (and/or the original requestor got nasty)
So to sum up what I'm getting out of the original post is
1) Treat others as we wish to be treated
2) Think about the color scheme in the chat room and how it might affect others ability to participate
3) This is not a "fighting war zone" and if you have someone being unruly or nasty, let the admin know.
ReRe ... correct me if wrong ...