User blog comment:HailfireKing/Team Names/@comment-13593058-20151016204242/@comment-13593058-20151017005928

That's fine as long as the connection is secure enough but no, last names are not enough as per this rule on the wikia which was written by Monty Oum himself. The first name has to be a colour.

I remember this because there was literally two all-out wars between admin/mods and several adamant users in the past four years on this issue and the rule still remains enforce: First name colour rule, no nicknames to substitute colours and last name coloured prefered.