As has been said before: e-shift definitely does have its limitations. It will fail especially hard on test patterns with on/off pixel contrast. And a test pattern with white, black, blue and green is such a test pattern. You won't find such pixel combinations in movies, though. In movies you pretty much never have a white pixel directly next to a black or fully saturated green, blue or red pixel. In movies every pixel is usually a part of a gradation of the surround pixels. When there are hard edges in a video frame, the difference between neighboring pixels will be much greater than in flat regions, but it still usually is a gradation where you won't find a black pixel right next to a white pixel.