_,,,^..^,,,_ said:

I could set the contrast lower to match better the DVD, but what if the DVD contrast was wrong?

The same argument could be made for the DVD colours not being 100% accurate. But since we know for a fact that the BD is presenting a revisionist version of the movie, the DVD is the most trustworthy source we have available for how the film originally looked.

In the absence of a theatrical reference, my preference would be for this project to match the look of the DVD as closely as possible.