If you prefer a darker theme instead of the default light theme on your Windows 10 then you’re not the only one.
Microsoft may eventually add a toggle to the Settings app that switches between a system-wide light theme and dark theme.
On Windows Phone devices all you have to do is go to the settings and switch between light or dark theme that will turn your Windows Phone background from white to black and vice versa.
On the other hand, Windows 10 doesn’t have such switching option, it just requires editing the registry.
This will enable the dark theme for quite a few universal apps, but not all of them.
Open the Registry Editor, by opening the search bar and type Regedit and then launch the app.
Now go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Themes\Personalize
(If you don’t find the key named “Personalize” then don’t worry, just create a new key and name it Personalize. For creating a new key, just right click on “Themes” and create a new key. Name it “Personalize“)
In the Personalize key, create a new DWORD (32-bit) Value and name it “AppsUseLightTheme” and set the value to “0“.
Now go to HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Themes\Personalize, again create a new DWORD (32-bit) Value and name it “AppsUseLightTheme” and set the value to “0“.
Now close the editor and Restart your computer.