On that point, it might be time to check the WB coefficients of your camera.
If your screen is properly calibrated to D65, just display a grey gradient on it, shoot it with your camera, then open the raw in darktable and do a spot-white balance on the whole ramp in the white balance module.
Finally, compare the RGB coeffs you got with the sampling with the “camera reference” ones, and report here in case of large shift.