@ Liferipper
Argh, sorry, mein Fehler. Ich hab die Subdivs vergessen.

Code (CSS): 
.postbitlegacy .postdetails,
.eventbit .eventdetails,
.postbitlegacy. postdetails .userinfo,
.postbitlegacy. postdetails .postbody  {
   background: blue none;
   color: white;
}
.postbitlegacy .postrow,
.eventbit .eventrow,
.postbitdeleted .postrow,
.postbitignored .postrow {
   color: white;
}