The cyanobacterium is capable of natural greens, blues, and violets.
Just a few months ago, FDA approved spirulina as a natural source of coloring for, among many food applications, ice creams and frozen desserts. Here's spirulina at work in a blue ice cream. The nutrient-rich bacterium is especially rich in pigmented compounds called phycocyanins, which make possible natural blues, greens, and even violets.
Color of the Week is a new series in partnership with natural colors specialists. The above photo is courtesy of GNT USA Inc. (Tarrytown, NY).