In both OS versions, the taskbar cannot be set to any arbitrary color without third-party tools (limited to the accent palette).
For full control (e.g., #FF5733 or pure black/white), third-party tools are required. customize taskbar color
A popular, lightweight app available on the Microsoft Store. It allows you to make the taskbar completely clear (invisible), blurred, or even change color dynamically based on whether a window is maximized. In both OS versions, the taskbar cannot be