Expressionism was a movement that formed in post-wartime Germany in staunch rebellion to the growing authoritarian presence in the country. This art movement wished to break away from that dreary reality using abstract and modernist influences, along with a rejection of norms of colour theory and stroke composition to create an unnatural, fantastical feeling.

This piece above here encapsulates this with its harsh contrast of cold (green and blue) and warm (peach and red) shades, along with its childlike abstraction of human anatomy, creating a cartoonish and juvenile love for art in complete rebellion to the imposed professionalism of realist, neo-objectivist and anti-degenerate artists at the time. The significance of her blue lips, which the piece is titled for, may represent the cold and bluish skin of a corpse, significant to post-war art.