You want to change the display of that page or everybody would read it differently?
I cannot very well do that, since it is not my page.
I want Safari to display any page with the colours set the way I specify, unless there is a way to get Safari to examine the background and just change it if it is too bright. With Firefox, I have a nice extension that dims the background if it is too bright, but I have not found any such thing for Safari, so I settled for an imported stylesheet instead. I guess I could just make the background colours a bit darker to read both white and black text on them.
UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; rv:1.9.1.3) Gecko Firefox/3.5.3