Rummage Sale Reject: There are several references to her wearing colors that clash badly or outfits that just don't go together, but people cut her some slack due to her blindness. It's also implied that she may be doing this intentionally. According to Equius:
Her dress is awful, teal and vivid red, and you suppose she chose it for the loudness of the colors. You have no idea where a woman might buy something so terrible. Surely no company would deliberately create such a dress, not that it is any business of yours.