reroute to MS xbox"

We purchased two new Philips Monitors (Momentum 272M8) last week to use with our two Microsoft Xbox one Ss.
We connected each to the respective Xbox one S yesterday.

With both Monitors, when using the X box to watch Netflix, and in some games ( in 11 of our games ), we are having picture colour issues.

When you click on any game or App on the Xbox to launch it, the game or App icon is normal full colour.
But with the ones that are affected with this issue, as the game or App launches, the screen goes black for a few seconds, and then as the App (Netflix) or the game loads / opens, about half the colour intensity disappears. Colours look very dull and
grey like.

If you then watch anything on Netflix, or on any of the affected games, it is like watching it at half it's colour intensity, it is like watching it through a grey filter. It is disappointing.

On Youtube, or some of the games, our colour is normal, the picture quality is great as you would expect. Colour is fine on Grand Theft Auto V, and Minecraft for example.
But on other games such as Forza Horizon 4, and Sea of Thieves, and anything that you watch on Netflix, we are having this same colour issue every time.

We have tried to troubleshoot both the Xbox and the Monitors, we have tried different settings on both, and combinations of settings between the two, but have been unable to work out what the exact issue is, or to resolve this issue.

Are you please able to tell us how to resolve this issue.
Hoping it is an easy fix with changing some setting.

:)