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Alkannin is a natural dye that is obtained from the extracts of plants from the borage family Alkanna tinctoria that are found in the south of France.
There have been studies on some species within the family Muricidae, because in those species this gland secretes the precursor to the historically important natural dye, Tyrian purple.
White is the natural color of woven cotton fabrics, while red is one of the earliest natural dye discovered by native acquired from the teak leafs, the flowers of Averrhoa bilimbi or the skin of mangosteen fruits.