I am bringing this idea back from this old thread here. I understand you guys have a full section that explains what each user group does and what not but this can really give new players that register a simple easier understanding with what color goes to what user group. You can view and install the mod from here. Very easy to install and some screen shots below shows the out come!
User Legend Out Come


Please note; you do not need all user groups added into the settings! Hope you guys approve!