Concetta Antico is a visual artist (obviously) who might be tetrachromatic (like birds). She tested positive for the gene, although there's still a possibility that she has a heightened form of trichromacy, ophthalmologist Jay Neitz told BuzzFeed over email.
Antico told New York magazine that she notices colors within colors. She sees emeralds, blues, and violets in the color black. Snow is a bunch of pastels. Antico can even tell when someone is sick, because she sees their skin turn gray, yellow, and green. There are some drawbacks, however: Pimples make her really self-conscious, because they look like a multicolored Vesuvius on her face.