By default this theme is just not obtainable within the settings, however you possibly can enable it utilizing a registry hack. To do that, open the Registry editor (Win+ R command for run after which sort regedit and press enter).
Within the registry editor, navigate to the next key.
On the correct panel, proper click and choose New-> DWORD.
Within the new DWORD, enter the worth identify as System Makes use of Mild Theme and enter the worth as 0.
Now reboot your pc and it’ll have the darkish theme obtainable. If you’d like to get again to the unique theme, simply change the worth to 1. We expect this feature to come to the ultimate construct of Home windows 10 when will probably be launched later this yr.
Source : Digital Adda