Anthocyanin pigments produce red and purple colors, though they are not always present in the leaves.
Violdelphinis an anthocyanin, a type of plant pigments, found in the purplish blue flower of A.
Projects in Burkina Faso have been led in 1994 to use a red desoxy-3-anthocyanin pigment identified as apigenindin from Sorghum in the dyeing industry.
Blue tomatoes have also been developed at the John Innes Centre in the UK using GMO gene splicing techniques, incorporating genes from snapdragons to increase the anthocyanin levels.
Commelinin, a blue pigment from the flowers of Commelina communis, is a complex of 4 Mg2+ ions chelating six anthocyanin molecules.
Petunidin could form in the exocarp of fruits from delphinidin, with an anthocyanin flavonoid O-methyltransferase (Catechol-O-methyl transferase) catalyzing the B-ring methylation and S-Adenosyl-L-methyl-3H methionine being the methyl group donor.