my chatbox all the names (admin mods and members)are written with red i want the mods to have and admin and members all to have different colors can you tell me how to do it please?

and can you make only the mods and admin or only mods change there color others can only use one

You need to create groups for your members. And you can change the existing colors of your mods and admins, as well as create colors for your other groups.

Click
HERE for the official tutorial on how to do this.