@JBP99
unfortunately digital vibrance in nvidia control panel only affects monitor, not HMD.
In the beginning of VR it was possible to thinker with HMD settings in Control panel, but Nvidia disabled this functionality. Main reason was that HMD with OLED rely on certain contrast/brightness settings in order to show colors and produce a “sharp” image/pixel.
In some games you can circumvent this with game specific settings, in IL2 i found a way, DCS has a mod that also allows to adjust colors. Same would be needed for MSFS.