[Xmonad] darcs patch: use a little more contrast in default tabs.

Hi all, I certainly don't want to start a bikeshed discussion, but I felt that the default tabs didn't have enough contrast for me to comfortably read them. This patch increases that contrast. I would ask that this not be applied unless it's approved by Andrea, who added these configuration options. But it seems to me that for the default we'd like to err on the side of greater legibility, and let folks with better eyes or better monitors customize their Config to look nicer. (Otherwise I would simply have made this change in my Config.) David Tue Jul 24 07:37:23 PDT 2007 David Roundy * use a little more contrast in default tabs.