Here's a copy of the main.gui file that I quickly played with to match the theme of my Ubuntu PC. I find due to the darker shades it's a bit easier on my tired eyes after a while as well. It looks like the image below if anyone would like to try it out. So far I can't find any visual issues.
![[Image: Screenshot%20from%202014-10-18%2020%3A52%3A08.jpg]](https://dl.dropboxusercontent.com/u/85675826/Screenshot%20from%202014-10-18%2020%3A52%3A08.jpg)
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OS = Ubuntu 14.04 LTS (64bit)
OS = Ubuntu 14.04 LTS (64bit)