But a black t-shirt is so boring! 

  If I can find my heretic t-shirt I might wear that.  I don't have any black jeans and the only black pants I have are wool and lined.  I have a few black skirts, though, so maybe.  I dunno.  Some decent tights, plus a skirt and the heretic t-shirt would probably do in a pinch, although I would feel pretty under-dressed.