The information applies to certain Kindle models made in 2017 and later.
Where Do I Find Dark Mode on My Kindle?
Tap theSettingsgear to bring up the Quick tweaks toolbar.
Kindle Paperwhite in Dark Mode.Lifewire / Rob LeFebvre
You’ll still be able to adjust the screen brightness if your Kindle supports it.
Amazon
Why Can’t I Find Dark Mode on My Kindle?
Either your gadget doesn’t support the feature, or the system software is out of date.
Amazon
Open a book and tap the page to bring up the menu options.
It looks like a capital A and a lowercase a (Aa).
Under Background Color, tap theBlack Circle.
FAQ
The steps for turning off Dark Mode are the same as turning it on.
Go to your gear controls and tap theDark ModeorInvert Black and Whitebutton to turn it off.