I have a x11 gui application running on GNOME (Fedora 24), which by default launches using the light GTK theme.
I would like to make it use the dark GTK theme variant, and found that after launching the window, one could do the following to change the theme variant:
$ xprop -f _GTK_THEME_VARIANT 8u -set _GTK_THEME_VARIANT "dark"
So, my question is, how to specify this setting at launch time, similar to this:
$ some_magic my_x11_app # launch as dark theme
? Thank you!