I mean the one for syntax highlighting, which I suppose is TextMate (I don't use it).
Incidentally, there is a vim version here: http://niw.at/articles/2006/08/06/twilight
Incidentally, there is a vim version here: http://niw.at/articles/2006/08/06/twilight
Adium is using the standard "Aqua" theme.
TextMate uses the standard "Twilight" theme.