Also consider that if things need to be read, high contrast is better. I think github, as an example, suffers from low contrast colors on many things, the file list being one; it's relatively hard (I need to put more effort into it than I think should be necessary) to see on every LCD screen I've tried it on. Obviously, I can fix this myself using greasemonkey or user stylesheets or something, but it seems to be a growing trend.