Not sure how I else to answer; my own medium destination is online viewing, so my requirements are far different than someone working in the film industry. But for myself - i just choose the look, render, pull it into my external software and check the color by eye. It’s obvious if it’s not matching the original intent, so from there I adjust whatever color processing input value is needed.
I don’t have to do this for every scene I render, ever - it’s find the combo that works, and then use that for everything else.