Thanks for the reproducer. JTextPane by itself does work correctly and has the right background and text colors from the theme, but when getting the TextPane.background color property the theme color is not being respect.
I haven't found any open issues in OpenJDK upstream about this problem and so far it seems to affect all codebases I have looked at (OpenJDK 8-16). To address that I have send a message to the swing mailing about this. I will add more comments when I get a reply. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1894419 Title: Missing TextPane.background property in GTKLookAndFeel causes white background on dark theme To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openjdk-lts/+bug/1894419/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs