I described a solution and still do not see reason to believe "There is nothing much we can do in the icon theme." Is what I described understandable?
I see examined my theme settings. It is Humanity-Dark. Even with a black panel, there is still insufficient contrast. -- panel icon has visibility and poor contrast against some backgrounds https://bugs.launchpad.net/bugs/494639 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs