Phycocyanin
Phycocyanin is a dark blue powder isolated from spirulina. It is mainly found in cyanobacteria, red algae and crypto-algae. Phycocyanin is also commonly divided into C-phycocyanin and R-phycocyanin, the former mainly found in cyanobacteria, the latter mainly found in red algae, and both in crypto-algae.