Monascus purpureus is a species of mould that is purplish-red in colour. During its growth, Monascus break down starch substrate into several metabolites, including pigments produced as secondary metabolites. The colour is currently available in purple and red. The main chemical pigment found in Monascus purpureus is Rubropunctamine, found to comprise between 57-87% of the total pigment produced.