Post impressionism does not refer to a single style, technique or even approach to painting. The most famous post impressionists all developed their styles independently. In the work of Van Gogh, we see bold, intense colors and very expressive work. Van Gogh was familiar with and shaped by the Impressionism movement but did not ascribe to the movement and took his paintings in different directions breaking away from the naturalism used by impressionists, which is why he was considered a post-impressionist.
