I know this has probably been asked for but I could not find, but why is there no plugin to allow certain usergroups to select their own username color? This would be an awesome feature for any forum and if someone thinks they can make one I would pay and so would many others.
I think that there isn't any plugin like this because it would be very confusing in the forum. What if they change their color to the admin's color, for example? Even if you disable the option to change their color to already existing colors in the usergroups, it would be still very confusing. A rainbow in the members list... It would be a good idea for a bronies forum, though.
A lot of non mybb forums have custom color for usernames. It would not really be confusing.