Scroll down to Accent color . You can choose "Automatic" (Windows picks a color based on your wallpaper) or "Manual" to pick a specific palette.
In the main Personalization window, click on Colors . how to change the colour of your taskbar
If you see a "You need to activate Windows before you can personalize your PC" message, these settings will be locked. You’ll need a valid digital license or product key to change these features. Scroll down to Accent color
Changing your taskbar color is a 30-second fix: Pair it with a high-quality wallpaper, and your workspace will feel brand new. click on Personalization .
In the Settings sidebar on the left, click on Personalization .