Deep color enables 10bit/12bit output, but I've never seen it actually work.
I like the idea of using limited range for the video driver ourput, that means the desktop is in the same range as your cable box, blur-ray, ps3, ect...
Then for the video settings you expand the content to 0-255 (but 0-255 is actually 16-235, since the desktop is being compressed).
With settings like that, video games, movies, general web browsing, will all match levels. So things should look correct.
CalMAN Lead Developer