Getting a dark theme on Windows 8.1 requires a bit more effort than on modern versions, as it lacks a native one-click "Dark Mode" for all apps
Unlike Windows 10, Windows 8.1 does not have a "Show color on Start, taskbar, and action center" toggle. However, if you use a high-contrast or custom visual style, title bars can become dark. dark theme for windows 81
This is the safest method as it uses Windows' native accessibility features. It turns most backgrounds black and text white. Getting a dark theme on Windows 8
How do I change the Color Scheme in Win 8.1? - Microsoft Q&A It turns most backgrounds black and text white
Windows 8.1 File Explorer does not support custom background colors without third-party tools.
Workaround: OldNewExplorer (by Tihiy) – can force dark listview backgrounds.