: Select "Automatic" under the Accent Color settings. Windows will intelligently pick a dominant color from your current desktop background to use on the taskbar. Third-Party Tools for Total Control
For users who want complete freedom to choose any color (e.g., blue, green, red, custom gradient, or even transparent), third-party tools are required. windows 11 task bar color
If the color isn't changing, check these three things in order: : Select "Automatic" under the Accent Color settings