Annatto is a colored pigment extracted from the Central and South
American plant Bixa orellana.
The color comes from the resinous outer covering of the seeds
of the plant, and is composed of the carotenoid pigments
bixin and norbixin, and their esters.
The central portion of those molecules is the same as that of
and the yellow orange color of annatto comes from the same
physical chemistry origins as the orange color of β-carotene.