By the way, I think that a mix of Pop!_OS GTK theme (from Adapta) and United-Gnome Ubuntu shell theme would do a great job. See attachements for an example. The United-Gnome GTK theme would be nice too.
** Attachment added: "Capture du 2017-07-17 04-25-31.png" https://bugs.launchpad.net/ubuntu/+source/ubuntu-themes/+bug/1704745/+attachment/4916074/+files/Capture%20du%202017-07-17%2004-25-31.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1704745 Title: Ambiance light-themes - LibreOffice has a white square top right To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-themes/+bug/1704745/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs