For a never-failing classic and casual option, you can always rely on this pairing of a coat and a white and blue sheath dress. As for footwear, introduce a pair of white leather pumps to the mix.
White and Blue Sheath Dress with Coat Outfits In Their 20s
A coat and a white and blue sheath dress are the ideal way to introduce some elegance into your current styling lineup. If not sure as to the footwear, stick to grey suede over the knee boots.