Check if third-party apps support Windows 10 dark mode.
Check if third-party apps support Windows 10 dark mode.
Because high contrast is a real focus, I moved away from third-party themes long ago. I can’t give specific guidance now.
Microsoft provides options for developers to understand the system's theme color. You can't force a theme change. Even High Contrast mode doesn't always work on apps using custom GUI frameworks. While many Windows tools support high contrast themes, UWP and possibly WinUI 3 are the only ones with built-in dark/light options so far.