First of all, the tag they use is not their clan tag at all. It's actually something called their regimental etiquette, an entirely different thing. However, you can change the color of your regiment tag and use it in-game by following this guide.
Steps to change the color of clan labels in Modern Warfare
* To do this on console, you must have a keyboard and mouse to operate it.
- Go to the Regiments tab - This can be done by going to the social menu.
- Create a new regiment which will require you to create a new name and label.
- In the Tag section, you must use a special 2 character code in front of the three letter tag. Use the table below for the correct color code.
Modern Warfare color codes for regiment label
- ^ 0 - Black
- ^ 1 - Red
- ^ 2 - Green
- ^ 3 - Yellow
- ^ 4 - Blue
- ^ 5 - Light blue
- ^ 6 – Violet
- ^ 7 - White
There are five spaces you can use to create a Clan or Regiment tag in Modern Warfare. Since you must use two spaces with a color code, you will only have three characters for the rest of the tag. In case you want the regimental label “SOS” in red, you type ^ 1SOS as the regiment label. He would check if he's available, then assign it to your regiment. In the example above, we have used AOT in green. We entered ^ 2AOT for the regiment tag.
Once you have created the regiment and created the tag, you cannot change it, but you still have to perform an additional step for it to appear in a game. Once this is done, you must make sure that it This is the tag you want to display by heading to the Barracks menu, then down to the Identity option. Once in this menu, hover over the Clan Tag option, then you will need to select it using the X / Square button to change the tag to your regiment tag. When finished, you should see an image like the one above with your specific label and color. You will also see your colored label at the top right of multiplayer menus, it will appear in the game's kill-feed, and other players will see the name above your head in a different color.