Solid black (optional) for menus background

[Korb]

Librera Reader currently uses the non-black color #424242 as its dark theme background. Here's how application developers argue for using #000 as a background color:

Google Android 14:

Dark Theme Screen / On some screens, Dark theme will use a solid black background which will help extend your battery life. After scheduling, Dark theme will be enabled when your screen is off.

Catima:

Pure black background for dark theme (reduces battery usage on OLED displays).

F-Droid:

Use pure black background in dark theme. Recommended only for OLED screens.