I always have omnifocus open on the laptop while I'm working on the external display and I don't like having a white bright screen on the side so I just made a darker template.
Screenshots:
http://www.frozen-layer.com/images/n...icture%201.png
http://www.frozen-layer.com/images/n...icture%202.png
Download link:
http://www.frozen-layer.com/images/n...e.ofocus-theme
I did it in a couple of minutes and it's not too good so if someone improves it I would appreciate if they post it here.