You had the MotoX right?I learned something today. I pulled my phone out of my pocket and all the colors are inverted like a photo-negative. I rebooted and the splash screens are normal colors but then as soon as the home screen pops up it's inverted again. I'm out in the hills with no internet coverage so I can't google it and spent the whole afternoon thinking my phone is fucked and I'm going to have to do yet another warranty replacement and put myself back onto the refurbished phone merry go round. Finally got home and learn that it's actually a feature for people with bad eyes or reading at night and somehow I managed to unlock the phone, flip to the second home screen, open settings, scroll to the bottom, open accessibility options, and flip that toggle, then get back out to the home screen just from the phone banging around in my pocket. Anyway it was weird. Cool story bro.
They released this "feature" as a ninja fix without telling anyone, it didn't even require downloading an update. I think it was time-released. I don't know.
Anyways, lot of people complained that it just turned on by itself the first day. You can just pull down from the top of the phone (clock/battery) and the setting is called Invert Colors right on that screen.
Saves you from going into options.