Van Gogh's trend colors
Vincent van Gogh, our favorite Dutch painter, changed his use of color rigorously in the relatively short period in which he painted.
There are several theories about this. One is that Vincent had an eye defect that caused him to perceive bright colors at a subdued level.
Another idea was that the Parisian Impressionists inspired him. They were also known at the time for using brighter colors.
Data research by Artnome.com points to the sunnier climate of the southern French area Provence as the cause.
By taking an "average" photo of each period at a pixel level, this could be determined quite accurately. What is clear is that in the "Provence period" when he is living in the south of France, van Gogh really goes all out with brighter colors, especially the shades of yellow.
More on this research by Artnome.com can be found here.