Without an official dark setting, desperate users turned to a built-in accessibility feature: .

Because Windows 8.1 lacks native dark mode, third-party patchers and theming engines are required for a true dark theme.

For a "true" modern dark mode (like Windows 10's dark theme) without the High Contrast side effects, you need to patch Windows theme files and install a custom theme. The most popular choice is by devillnside (available on DeviantArt).

Because Microsoft didn't provide a sleek dark option, a dedicated underground community of modders on sites like stepped in.

How do I change the Color Scheme in Win 8.1? - Microsoft Learn