From my experience, it's best to set your console to limited/standard and set your black level on your tv to low for best picture. I had it set to Full RGB on my Xbox and my black level on my tv to full for a few weeks thinking I getting the best picture that way. But I started noticing the blacks looking more dark gray when gaming and I thought it was the VRR causing raised blacks from the stuff I was reading online. I then tried my John Wick 3 4K blu ray on my Xbox series X and it looked bad. The bottom letter box was gray and not a dark grey but grey. The Picture looked washed out over all. I then switch to Standard/limit on my xbox and set my black level on the tv to low and the picture looked a lot better. The blacks were deep and the colors looked more vibrant.

This is why Vicent Teoh does not recommend the Xbox Series X/S for blu-ray playback, only the Playstation 5 (or of course, a stand-alone player).

It's not an issue with colors it's an issue with how the Xbox treats blu-ray playback.

For gaming, you want Full/High RGB. For blu-rays/streaming, you want limited/low. Xbox doesn't differentiate between the two and so the TV doesn't know if you're gaming or watching blu-rays. The PS5 does.

But does the TV access Reddit and get the answer ?

That doesnt answer my question as to why to do that. As I said, not everything uses full RGB

It's not a simple answer. There are too many factors.

Do you use your PC to only game and normal PC stuff? If so, RGB Full. If you watch Blu-rays on it, it muddies the water and isn't a straightforward answer. If your blu-ray player windows app can convert Limited Ycbcr to Full RGB, you're fine staying with RGB Full.

Also goes for consoles, but answer is a little easier. Full RGB will give you the best gaming experience (same as PC). But blu-rays are produced with Limited in mind, so use the Playstation 5 (colors set to Auto) to watch Blu-rays and set the CX to Black Level Auto, and it'll do all the work for you.

And then there's streaming...... so don't use your PC/consoles for it. Chromecast, built-in apps, roku, etc are better so your TV can really separate them.

Vincent goes pretty detailed here: https://www.youtube.com/watch?v=gisqN_UL1CM

Where's our "This post again?" flair? :)

Depends on the source doesn't it. For example, the PS5 defaults to full RGB so I have my C9 set to black level high since it doesn't have Auto and I just switch the TV to low for limited content such as blu rays.

Auto is available if you change the input type on the TV to PC. Just learned this recently