Who was interested in color theory and painted Red Roofs, which the author describes as a "random patchwork of red and green, orange and blue [that] appears through a veil of tree branches that interrupt the viewer's vision"?

Camille Pi-ssarro.

Explanation:

Camille Pi-ssarro was a French painter who influenced painting styles of Impressionist and Post - Impressionist movement. He was best known for his humanistic paintings. Pi-ssarro was in search of new ideas and he was interested in Color theory.

His "Red Roofs" Painting was the most celebrated painting of the modern paintings. The painting was an unusual landscape which portrays the slopes of the roofs in varying shades of orange, red and brown.

So, the correct answer is Cam-ille Pi-ssarro.