Anyone with a green name is a Donator.
Anyone with a red name is an Admin.
Anyone with a purple name is a Moderator.
Plus, right under their name, should be a Rank depending on their color of their names.
Some people will have different ranks depending on what they do on the forums or the server.
For example; under my name it says: Forum Owner. I'm forum owner so that's how i get the name.