User blog comment:Dopp/Technical Update: November 15, 2011/@comment-3066124-20111116133021/@comment-1091639-20111116140815

Yeah, 'fixed' color themes are bound to make some users unhappy. You'll have to resort to CSS overrides if you want the editor to look like you want. I recall the template editor has always shown odd styling bugs, like the one in the screenie.