How does Stevenson use contrast to describe the city streets?

In "Dr. Jekyll and Mr. Hyde," Stevenson employs contrast to vividly depict the city streets, highlighting the dichotomy between the respectable, well-lit areas and the dark, sinister back alleys. The polished facades of the city represent civility and order, while the shadowy corners symbolize the lurking chaos and moral decay. This juxtaposition not only sets the tone for the narrative but also reflects the duality of human nature present in the characters. Through this contrast, Stevenson emphasizes the tension between societal expectations and hidden vices.