User blog comment:Deathmanstratos/Call of Duty: Black Ops II Origins Intro Cinematic released/@comment-1892823-20130823052737

I have a theory about the two eye colors. Focusing the opening, it looks like the purple eyes are indoors similar to Ghost lady and the yellow eyes are your typical zombies. Purple eyes are probably gonna take a little longer to kill like the vest zombies in Die Rise. Other than that, that's all I got.