By default, a settings window in Windows 10 has a white background. This tutorial will teach you how to change the settings window to a dark background by tweaking registry settings.
Change background of Windows 10 settings
Step # 1
Press Windows key + R from your keyboard.
Step # 2
Type regedit and then hit Enter key from your keyboard to open the registry editor.
regedit
Step # 3
Go to following location in registry.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Themes
Step # 4
Right-click on the right side of the window, scroll to New -> key and click it.
Step # 5
Name the new key 'Personalize' and then click on it.
Step # 6
Right-click on the new window and scroll to New and then click DWORD (32-bit) Value.
Step # 7
Give newly created DWORD the name of "AppsUseLightTheme".
Step # 8
Double-click the newly created DWORD and set its value to "0".
Step # 9
Go to the following location in the registry.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Themes\Personalize
Step # 10
Right-click on the right window, scroll to New and then click DWORD (32-bit) Value. Give newly created DWORD a name of "AppsUseLightTheme".
Step # 11
Double-click the newly created DWORD and set its value to "0".
Step # 12
Close registry editor and reboot the PC.
