How do I get Google dark mode?
To get Google’s dark mode on your device, click on the gear icon in the top right of the screen to access your settings, then go to “Theme”.
There, it should allow you to select light, dark, or a flexible option that adjusts to the time of day.
If your Google dark mode is still dark grey it means they new pitch-black update hasn’t been sent to your device yet, but it should be in due course.
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I did try that: