Originally posted by Michael Müller
And the doubts about the silver colour of the W25 will even rise if we look at these pictures, same event, most probably even same camera...
Well, how about a direct comparison by putting them next to eachother:
Some comments on this. The light is the same (see the sharp shadows under the cars), the event is the same, the place is the same, as is the track. The spectators are also identical: look at the guy in his light-coloured suit, no hat, waving enthousiastically with both arms.
Now, for the fun stuff. The AU-picture has had a little more exposure than the Mercedes one, it is clearly brighter. I've used the mountains in the back and the guy in the suit as references to slightly darken the Stuck-picture, compensating for the difference in exposure. The left picture is the original one, the right is my corrected Stuck:
We know for a fact that the Auto Union was silver/grey. There's very little difference with the Mercedes. If the latter had been white, it would really stand out in this comparison. But even its number plate has a darker tone than Stuck's overall, the papers that people in the back are waving and the shirts they're wearing. So I'd say the Mercedes was either matt silver or light grey, not white.