If it has been modified, you should, at the very least, set up custom D65 coefficients in the white balance module.
Explained in the manual: darktable 4.6 user manual - color calibration
And in this video:
If it has been modified, you should, at the very least, set up custom D65 coefficients in the white balance module.
Explained in the manual: darktable 4.6 user manual - color calibration
And in this video: