A little late to the game, but this one I know :) As of Driver version
353.30:
Go to NVIDIA Control Panel -> Display -> Change Resolution
Look for "Output color format" and change the setting from 'RGB' to 'YCbCr444'
Update in response to fixer1234:
The fix isn't so much magic as a little bit of troubleshooting logic.
At first, I thought the monitor was defective and I dealt with it. After a couple of days, I came across an unrelated home-theater article that explained the difference between RGB and YCbCr, which boils down to color range and differences between displays. Finally, I poked around the video card settings until I found the toggle.
For a better explanation of RGB vs. YCbCr, see RGB: Full vs. Limited from the Reference Home Theater Site