I've upgraded my Ubuntu 19.04 to 19.10 and all work good but I have a little problem. Some elements in top bar have white color instead dark.
1 Answer
Those white menus are the GNOME Shell theme, and not the GTK+ (applications) theme, and that's how Ubuntu 19.10 looks by default. Changing the GTK+ theme to Yaru Dark doesn't affect this. If you don't like those white menus, you'll need to change the Shell theme, not the GTK+ theme.
If you want to get dark menus and dialogs with the Yaru GNOME Shell theme, see this guide.