All of the peas we produce are white-flowered peas

Peas contain the pigment known as anthocyanin which gives plants and fruit a red-purple color. This is the same pigment that gives grapes or apple skin their coloring. There was a demand to breed out this pigment due to the anthocyanin making the purple-flowered pea more bitter-tasting to humans and animals than a white-flowered pea.

Image credit Simon Cross Genetics 4