Hi, not sure if this is the right way to send feedback.
I recently upgraded my system to Ubuntu Studio 16.04, which bundles with XFCE 4.12 (I think).
I had used the Dorian theme before, but after installing it in the new system (from this repository), I noticed that list boxes display with a light background and light text, in multiple applications (I've seen the problem in the SuperCollider IDE, qjackctl and Frescobaldi -- in the SC IDE, it occurs in the file list in the file-open dialogue as well).
At first, I logged the issue as a SuperCollider bug, but after seeing the same problem in other applications, I conclude there is some entry missing (probably listbox BG) from the Dorian style sheets.
I know next to nothing about Gtk themes and it will take me hours to find the name of an entry that is omitted... so, logging an issue.
Thanks -- (and thanks for publishing this -- it's my favorite color scheme).
EDIT: PS, I am using the qt5ct symlink qt5ct -> /usr/share/themes/Dorian-3.14-14/qt5ct/
and I did log out and log back in.