2 Finding a colour scheme

These colours are influenced by the impressionistic painters of the Ashcan School, who portrayed the lives of the lower working class in New York in the beginning of the 20th century. I like the grainy, realistic feel of some of their paintings. My colour scheme has its roots in the sky: its dominant colour creates a unifying scheme in this environment. The colour of large objects, such as the buildings, change according to the environment. I choose some local colours to create a unifying look and add visual interest. I want harmony, but want to avoid a monochromatic image.