Go for a pared down but at the same time casual and cool option in a black button down blouse and a black tweed mini skirt. Over the knee boots integrate really well within a ton of getups.
Black Button Down Blouse with Over The Knee Boots Warm Weather Outfits
A black button down blouse and navy skinny jeans are a combo that every modern girl should have in her off-duty arsenal. All you need is a pair of over the knee boots.