By creating a custom resolution of an HD device, on the same page, you can make sure that the ‘ Full Range RGB 0-255’ signal over HDMI can be ensured.
Many of the HDMI color problems with NVIDA and AMD graphic cards can be solved by following any of these solutions – Solve Nvidia Color Settings Reset Problem
Disable Calibration Loader Windows 10 – Stop reset Nvidia Color Settings.
Set Nvidia Color Caliberation – Fix Reset Problem.