I've found code on here to add prefixes to a user group in the legend, and to add prefixes to specific users... but I would like to know if I can give prefixes to an entire user group in one shot, rather than having to do each member individually.

Edit: basically I want to be able to do what the Forum Administrator group does (Prefixed automatically with "@"), just with other custom User Groups.

Hello Alaskamo,

You can set specific styles for group members simply by selecting the group color which has colored those users. This should only affect usernames.

Code:

a span[style="color:#C20000"] strong:before {
  content: " [A]";
  vertical-align:text-top;
  font-weight:bold;
  font-size: 7px;
  color:#c20000;
  text-shadow: 0px 0px 0px #c20000;
}

Result if your group color is #C20000:

All you need to do is modify this peice:
a span[style="color:#C20000"] strong

To the EXACT HEX COLOR of your group. You can see the colors of your groups by going to..
Administration Panel > Users & groups > Groups > Groups administration >

Edit the group you want, look to 'Group Members Color', copy the hex color, and paste it into the selector.

Well there's a clever bit of coding, and it works great! Thanks!

You're welcome! ^^