The Trend One of my favorite trends in Interior design is black trim around windows & black windows. It makes the windows pop & really frames the view outside turning the windows into works of art. The black window trim & windows makes the space look more custom & helps anchor the room. Black trim is beautiful & can be so classy & fabulous when done right. Inside & outside adding black trim adds a dramatic custom touch that adds so much character that can be as affordable as a can of black paint. Source. Source. Source. Source. Source. source.