Issue: Book "sidebar" sections keep background color when switching between light/dark themes
Platform: Linux
Settings:
Default Dark theme and Default Light theme
Steps:
- Find a book with a sidebar section (this one has a grey background).
- Switch between themes that change the font color (i.e., Default Dark/Default Light)
Suggested Correction
When switching modes, change the background of this element. (Perhaps inverse(1) or allowing for custom color setting when designing themes).
Screenshot with a more "expected" representation.

Issue: Book "sidebar" sections keep background color when switching between light/dark themes
Platform: Linux
Settings:
Default Dark theme and Default Light theme
Steps:
Suggested Correction
When switching modes, change the background of this element. (Perhaps inverse(1) or allowing for custom color setting when designing themes).
Screenshot with a more "expected" representation.
