Crocin

Crocin is a chemical compound that produces a type of natural pigment. It is found in the flowers of crocus and gardenia plants. It has a deep red colour. Crocin is what is mainly responsible for the colour of saffron. It is also called saffronin or polychroite.
Crocin was used as a dye for textiles. Because it is unstable it is no longer used for that purpose..