According to a blog post on Sledgehammer Games' website, the developer estimates that around one million active Call of Duty players are affected by color blindness. 

As such, the team is already working on a color blind assist option presumably similar to the one featured in last year's Call of Duty: Black Ops.

Kudos to Infinity Ward and Sledgehammer Games for continuing this thoughtful practice with the Call of Duty franchise. Here's hoping that other developers pick it up in the future.

{Source: GameInformer}