Here's a video I put together that was shot on my 6D back in August.
The time-lapse of the stars at the end took some time, and I'm not sure what was going on. Perhaps someone here can help with that? I had the settings on manual and didn't touch them as the camera worked, yet every frame was a different color. Here's what I originally had before I went through and individually edited the photos...
I did recently shoot another few time-lapses with updated ML firmware, and I didn't get that effect again, so I could have been something with that particular nightly build I was running.
I was not on auto white balance. I had it set to a manual Kelvin temp.