Howdy! This is one of the easiest things in vBulletin - just posting this for our beginners :D
Step 1: Go to AdminCP > Usergroups > Usergroup Manager Step 2: Edit usergroup. You have to do this for each usergroup that you like to be colored. Step 3: Add this code in username HTML Markup:
First Textbox:
Code:
<span style="color: XXXX;">
Replace "XXXX" with your color name/code, visit www.w3schools.com for a HTML Color Table.