It reminds me that @anon41087856 provided in Step 6 : channel mixer of darktable 3.0 for dummies: hardcore edition a matrix adapted to REC2020 working space from ACES to mitigate the OOG blue.
It is very simple to use these matrix in the ART channel mixer and results are satisfying, even if I dont know the theoretical principle.
I find the second matrix (ACES) an effect more specifically aimed at the OOG blue.