There are several pigments that can cause purple coloration in nature. One of the most common purple pigments found in plants is anthocyanin, which is also responsible for producing red, blue, and purple colors in flowers and fruits. The specific type of anthocyanin and the pH of the cell sap can determine the color of the plant.

In animals, there are some species that appear purple due to the presence of pigments called porphyrins. Porphyrins are a group of organic compounds that contain a ring-like structure and are involved in several biological processes. They are found in the skin and feathers of some birds and the shells of certain mollusks, among other organisms.
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