Well, Google has finally rectified the situation, with Dynamic Color now supported in Google Play Books, perhaps thanks to the app's most recent update.

Dark mode in Google Photos for the web is finally available for everyone. To activate it, just hop into Settings, find “Appearance,” and pick Light, Dark, or System default. Instead of true black, ...

Google has officially rolled out dark mode for its Photos web interface, offering users a long-awaited visual alternative to ...