Sorry, It seems, that I have forgotten to say, that the problem is solved.
In many cases, the reason for such a problem is sitting half a meter in
front of the screen. This time too, the reason of the problem was me.
I told dispcalGui to build a profile, not realizing, that darktable
cannot manage LUT-based-profiles very well. The profile, generated with
the default settings of discalGui, made a matrix with R and G swapped.
That was the reason for the wrong colors.
By the way: In my eyes, this settng as default in dispcalgui is a little
bit unhappy for a normal user, who only wants to build a running
icc-profile (Sorry Florian)
