I found purple carrots at the farmer's market a few weeks ago — those I prefer not to cook to preserve its unexpected color. (realfoodkosher.com)
I use purple carrots to give the porridge an extra cool look. (nutriplanet.org)
Many natural colors are sensitive to changes in pH. For example, purple carrot juice will be red at pH 3.0, but it will be blue at pH 7.0. (farbest.com)