Google
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Samuel Horti
Dark Theme
Android Q.
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Android 10
the Dark Theme
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Android 10
You’ll see a toggle for Dark Theme: tap to activate it and you've then got it up and running.If you don’t want to scroll through your settings every time you need Dark Theme, there’s a much quicker option that involves pinning it to your Quick Settings, which are the big tiles that appear when you pull down your notification bar.To add Dark Theme to your Quick Settings, pull your notification bar all the way down until you see a large grid of tiles. You can now turn on Dark Theme by pulling down the notification bar and tapping the icon.
As said here by Samuel Horti