Hello,
There are a lot of people who used the hack mw3 Chromatix ( collor changer ) and they forgot to make a backup.
So if you want to get your old collors back, follow this link:
https://support.steampowered.com/kb_...2037-QEUH-3335
follow the instructions.
MAE SURE YOU MAKE A BACKUP!
cheers,
Aram1