Not to throw a wrench in the speculations, gentlemen, but here's another comparison. One thing to consider is that the plane's shadow appear to be nearly directly beneath it, but is diffuse without any real darkness or sharp edges. This suggests to my eye that the photo was taken on an overcast or mostly cloudy day with the sun fairly high in the sky. So, another question to ponder is whether the ambient lighting is revealing truth or playing tricks? Comparing the darker color on the upper fuselage deck with the stripes on the tail, which are cast in similar ambient lighting as opposed to the vertical fuselage sides. The darker grey tones in those two areas differ so very slightly that the contrasts are nearly indistinguishable against either a white or black background.