On Fedora with Gnome-shell 3, its been long time that I was not able to get transparent window. So, finally I thought to spend some time to try to fix that. Finally got that fixed with all the configurations below in the conkyrc. Here the default color is set to LightSkyBlue but feel free to change that.
I hope this helps fedora community who is struggling to get transparent window. And here is the code :
and when you install this, you will find that the permissions for the files are not appropriately set, so go to your ruby gems directory or the installation directory for nokogiri-plist and change the permissions.