In your screenshot the triangle exclamation mark icon next to "Shell" generally means the user-themes extension is not installed or not working. That would probably agree with this bug :)
If it is installed then let's focus on why it's not working. To best do that we need a bug report against that particular package. So I recommend running: ubuntu-bug gnome-shell-extensions and then we can mark this as a duplicate of the new bug. ** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1842886 Title: gnome-shell top bar menus no longer honour dark theme settings Status in gnome-shell package in Ubuntu: Incomplete Bug description: When you selected a dark theme, the gnome-shell top bar menus used to also switch to match the theme (ie light text on a dark background) - eg see the screenshot showing the top-bar calendar at https://micheleg.github.io/dash-to-dock/news/2015/03/01/approaching- gnome-3.16.html). This is no longer the case - see attached screenshot for yark-dark. It's the same with adwaita-dark. ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: gnome-shell 3.33.91-1ubuntu1 ProcVersionSignature: Ubuntu 5.2.0-15.16-generic 5.2.9 Uname: Linux 5.2.0-15-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu7 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Thu Sep 5 16:01:07 2019 DisplayManager: gdm3 InstallationDate: Installed on 2019-07-01 (65 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190606) RelatedPackageVersions: mutter-common 3.33.91-1ubuntu1 SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1842886/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp