Welcome to my very first (somewhat) tutorial for changing you username in Call of Duty:Ghosts (using UnnamedPlayer because it does not go by the 'color remover')
First you'll want to open up Cheat Engine and attach...
Then you'll want to go to "Add Address Manually" and enter 1408537A0 (set type to "Text")
Find your username (shouldn't be hard for you unless your a complete noob at this) (with Cheat Engine, by the way..)
Set your username to nothing but 1 space. It should be changed to "UnnamedPlayer"
Now you'll want to edit the address from earlier...
Your name will change to what you set that address too now
You can Google how to use buttons in your text,
I'm too lazy