To my bare eyes it seems the alpha level of top bar is ~0.3 whereas alpha level of the dock is 0.2 by default when all windows are hidden. I changed the the alpha level of the dock to 0.3 using dconf-editor and now it seems they're pretty much consistent with each other.
** Attachment added: "alpha.png" https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-dock/+bug/1722479/+attachment/5002973/+files/alpha.png -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1722479 Title: Dock and panel are different opacity/transparency/colour To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1722479/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs