On Wed, 24 Mar 2004 11:54:30 GMT, "Cereus-validus"
wrote:

Wrong Nimrod. The purple color is carotenoid pigment like in all Solanaceae.
Potatoes also come in yellow, orange, pink and red even though you seldom
see those colors in general cultivation.

http://www.foodsubs.com/Potatoes.html

http://edis.ifas.ufl.edu/CV283

Thanks!