Color Anthocyanins

Anthocyanins are water-soluble pigments responsible for red, purple, and blue coloration in cannabis flowers, leaves, and sometimes pistils. These compounds belong to the flavonoid family and are produced in response to light exposure, cooler temperatures, and genetic predisposition. Color anthocyanins are distinct from chlorophyll and carotenoids, which produce green and yellow tones respectively. High-anthocyanin cultivars often display dramatic purple, violet, or deep red hues, particularly in late flowering under UV-B light or lower temperatures. Lineage records frequently report anthocyanin expression in varieties with heritage from cooler-climate growing regions or specific parent lines selected for pigmentation traits.

Breeders working to develop visually distinctive cultivars intentionally select parents with strong anthocyanin expression and stable genetic markers for color stability. Stabilizing anthocyanin traits across generations requires careful phenotype selection, as environmental factors significantly influence final pigment expression even in genetically predisposed plants.