Running Eclipse Mars (or any other application) with an alternate GTk3 theme?

Hello,

My current GTK3 Theme is Adwaita, and I normally use the Dark theme. I’m also using the Gnome desktop environment. However, Eclipse Mars now seems to be using the light/dark settings when I select the GTK theme.

Is there a way I can launch Eclipse with a specific GTK theme?

After some googling I found a possible solution and gave it a shot, but no luck. I modified the .desktop file for my Eclipse launcher like so:

[Desktop Entry]
Comment=
Terminal=false
Name=Eclipse
Exec=env GTK_THEME=Adwaita:light /home/oapeter/bin/development/eclipse/eclipse
Type=Application
Icon=/home/oapeter/bin/development/eclipse/icon.xpm

Is there a different way to achieve this or is there maybe just something I’m doing incorrectly with this file?

Thanks a lot!

For those who may be interested: It turned out it was my mistake. It works after logging out and back in again.