According to the following the white-on-black display uses less power.  Also, I found that once I altered a little bit of the default color scheme I had to alter ALL of it somehow, like changing the background and text color would mess up the border and highlighting color.  It's an area where I need to do some more learning.<p><a href="http://blog.javia.org/nexus-one-display-and-subpixel-pattern/" rel="nofollow">http://blog.javia.org/nexus-one-display-and-subpixel-pattern...</a>