Hopper

 I noticed that everything related to the city environment is geometrical-made up of straight lines and rectangles. There are so many grids and repeated geometric shapes. Hard lines. Nothing organic or natural except the interior furniture , the woman, the vase and the flowers.These all have curves. They are the only curves in the painting. 
It is the city alone which is not organic.

I want to say a quick word about contrast. 

There is contrast of light and dark, warm and cool colors and of saturated and muted colors. 

Contrast attracts our view and moves the eye around the surface of the scene.