For centuries, artists had to make their own paint. Medieval artists stored their paints inside pig bladders that were cut into squares and tied with a string. The process was messy, time-consuming, and labor-intensive.
Then in the 17th century, people called colormen began selling premade paints. This saved artists time, so they could focus on making art.
Vincent van Gogh was so thankful for his colorman that the artist made three portraits of him, including the one above. In this 1887 example, Van Gogh celebrates the variety of colors, especially the saturated golden yellow, Julien “Père” Tanguy sold.