Hi!
I am using Vegas Pro 18.0 and I've been having this recurring issue for a while now.
So I would record whatever, a desktop clip or a videogame clip, and it would perfectly show the recording in my player without any issues. That is until I import it to Vegas. Just from the preview mode the red seems to be in a "lighter" tone than usual and the rest of the colors would look completely fine, I initially thought there would be no issues with it once I rendered it but I was obviously wrong. I tried messing with the video properties tab as well as looking up for a long while for a solution but I really couldn't know how to call or even phrase my issue other than just saying the colors are changed after rendering. I don't know much about this stuff so any help or context for this would be appreciated!
I own an NVIDIA RTX 2060 6GB too.
Here's both pictures of the original file (left side) and the rendered file (right side), notice the red tone variation:
I think it is good to add that I originally also thought the colors might had been messed up because it was a recording of an old game (The Binding of Isaac from 2011) but it happens if I record anything else too, the desktop even.