If you do go Win 11, its Win+Alt+B to switch HDR on or off. And the Windows 11 HDR calibration tool works well too if you havent calibrated your monitor
https://support.microsoft.com/en-gb/windows/calibrate-your-hdr-display-using-the-windows-hdr-calibration-app-f30f4809-3369-43e4-9b02-9eabebd23f19