This is definitely a case of wrong/missing/mismatched color profiles.
To better understand all of that, I recommend you read the articles here (starting from the top):
Unrelated to that, I noticed that you use both base curve (courbe de base) and filmic rgb. Don’t do that. DT has three tone mappers: filmic rgb, sigmoid and base curve. You should only ever use one at a time. And if you do use base curve, it should be where filmic is in the pixelpipe. What you do now basically means you are using a (broken) display-referred workflow (without realising it).
Some more about that here:
I recommend you watch this tutorial, to make sure you understand the basics of scene-referred:
