Color tinting on a monitor is generally a hardware problem or a improperly seated cable. This is really common with VGA connectors since pairs control RGB aspects and the + and - pins are on opposite sides so a skewed cable would result in the lose of one or two of the three colors. The connector on the monitor could also be damaged resulting in the same issue.
Uninstall the gpu drivers, get the utility DDU and boot to safe mode to remove any remnants, then reinstall the gpu drtivers. If there are drivers for the monitor install them too.
Have you considered the "Filters" They should not have altered from the defaults, but thing happen with Microsoft/Windows 10 updates Settings -Ease of access (Dumb place to put them!) - Colour Filters.-
You certainly have tried resetting the monitor to factory defaults? And you have tried resetting all parameters back to factory defaults in screen graphics and or configuration settings? Of course, stupid question, but you never know, it might be some gamma correction out of range..... Has this happend suddenly or after an install or something else? Can you try the monitor on an other system?
Have you considered the "Filters" They should not have altered from the defaults, but thing happen with Microsoft/Windows 10 updates Settings -Ease of access (Dumb place to put them!) - Colour Filters.-
Thanks for the tip. I changed the color filter settings to a different setting and display is normal now. Perhaps this setting was changed during a recent install ??