karlsemple meant these stept:
ACP --> 'Users & Groups' --> 'Group Management' --> 'Registered users' --> Search your username and check the box --> Action: 'Make group default for member', or something like that.
Look yourself up
In the drop box on the right choose groups
Then you'll see a list of the groups you're in with text next to each one saying 'Make group default for member'
Just click that text for the registered users group.
Your default group is then the registered users one so you take on the colour of that group, but you are still an admin.