Digged little bit into gtk3 css-ing and created workaround: Add to ~/.config/gtk-3.0/gtk.css:
.nautilus-window notebook tab:checked { background-image: linear-gradient(to top, @selected_bg_color, alpha(@bg_color, 0) 3px); } Active tab will be underlined with theme color. Remove ".nautilus-window" to affect any tabs, not just content tabs in Nautilus window. Works in 18.04. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-system-monitor in Ubuntu. https://bugs.launchpad.net/bugs/1557981 Title: Selected-Tab Hard to Distinguish in Default Ambiance Theme To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-themes/+bug/1557981/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs