Phycocyanin is the main part of the spirulina blue color.It is protein combined pigment,has the same character with protein.We can see blue granule or powder with our naked eyes.It is water-soluble. It is absolute a natural pigment abstracted from the sporus of Spirulina Arthorspira platenis by modern biotechnology.Widely used in ice cream,cakes, fast thawing powder, horse radish powder, frozen stick confection, ice lolly,jelly, candied beverage,cheese products etc as blue coloring.