Hi, I am an Independent Advisor.
Please let me help you with this concern about the taskbar that has change its color after GEForce Driver update.
You can try to change the color of the taskbar by following the steps below.
For Windows 11
Change the color of your taskbar
Select Start > Settings > Personalization .
Select Colors and scroll to Accent color.
Turn on Show accent color on Start and taskbar. This will change the color of your taskbar to the color of your overall theme.
Note: This option is only available if you select Dark or Custom as your Windows color (under Choose your mode). If you choose Custom, you'll also need to choose Dark for Choose your default Windows mode.
For Windows 10
Change the color of your taskbar
Select Start > Settings > Personalization .
Select Colors and scroll down to Show accent color on the following surfaces.
Select Start, taskbar, and action center. This will change the color of your taskbar to the color of your overall theme.
Source link: https://support.microsoft.com/en-us/windows/how...