Why is my galaxy s5 stuck in grey scale/back and white? Ultra power save is turned off.

[AC Question]

Restarted phone 3x. When it first restarts, I have color, but then it goes to grey scale

 

[B. Diddy]

Welcome to Android Central! Any Accessibility options turned on? Assuming the Ultra Power Saving mode isn't turning back on by itself when it turns black and white, try wiping the cache partition: http://support.t-mobile.com/docs/DOC-10404