See the following for more information:

Dynamic Theme

Android 12 introduced Material You, allowing you to personalize your device colour theme based on the colour scheme of your home screen wallpaper or on a basic colour of your choice. From the Android "Wallpaper & style" setting page, select a colour scheme you wish to base your device colour theme on.

eLibrary Manager provides you with the ability to enable dynamic theming from either the navigation drawer or from the "Enable dynamic theming" setting in eLibrary Settings. When enabled, eLibrary Manager reflects the colour scheme selected in various user interface elements.

Note: The dynamic theming feature is only available in Android 12 or greater.

Dynamic ePub Reader Night Mode Background Colour

When dynamic theming is enabled, you can configure ePub Reader to select a complementary colour for night mode background colour based on the dynamic theme in effect. This ePub Reader setting, when enabled, overrides the explicit night mode background setting you may have set.

Set Android Wallpaper Theme
1. Set Android Wallpaper Theme
Enable Dynamic Theme
2. Enable Dynamic Theme
Dynamic Theme Enabled
3. Dynamic Theme Enabled
Dynamic Theme Enabled
4. Dynamic Theme Enabled
Dynamic Theme Enabled
5. Dynamic Theme Enabled
Dynamic Theme Enabled
6. Dynamic Theme Enabled
Set Android Colour Theme
7. Set Android Colour Theme
Dynamic Theme Enabled
8. Dynamic Theme Enabled
Enable Dynamic Reader Night Background Colour
9. Enable Dynamic Reader Night Background Colour
Dynamic Reader Night Background Colour
10. Dynamic Reader Night Background Colour