You can change the dot colours with dconf. Look in org.gnome.shell.extensions.dash-to-dock with "dconf Editor", specifically the custom-theme-dot-border-color and custom-theme-running- dots-color both set to #e95420 (orange).
However, besides the dots it looks like we're stuck with orange in the window preview of the Dock (and also when alt-tabbing). C. ** Package changed: ubuntu => gnome-shell-extension-ubuntu-dock (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1725536 Title: Ubuntu 17.10 Dock doesn't respect the color choice of the Gnome Shell theme To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-dock/+bug/1725536/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs