It does change chroma, but that is why I use it as a portion of a skip bleach.
You could also use one of the “Composite modes” that are available inside the “Layer” node. That may do what you are looking for… Or you could do as Sascha described and use a composite mode in the Conform page with a duplicate piece of media on V2.
Play around, DaVinci is super powerful… I’m sure there are at least a couple of ways to do what you are looking for.