I recently sowed a row of carrots and had only Cosmic Purple–a dark and richly purple-black root, come up from the seeds. Cosmic Purple is so dark it stains fingers for a day after being handled. it is a sweet, crisp, mid length carrot with a lovely top that also carries a purple tinge near the base of the leaves.
So shy are almost all carrots orange? Blame it on politics and citrus. For the details check out this article: https://www.tested.com/science/43812-the-crazy-history-of-the-orange-carrot/