Highlight Appearance of Fire in Darktable

Maybe the color shifts are there before filmic, try with a dcp profile.

The image in this discussion has similar color scheme
https://discuss.pixls.us/t/cannot-get-close-to-jpg-from-sony-alpha-6000-with-raw-processing/10536

ooc jpeg preview

ART with dcp profile and a per-channel rgb curve

ART without dcp profile and a per-channel rgb curve