Trichotomine is a bright blue

pigment A pigment is a colored material that is completely or nearly insoluble in water. In contrast, dyes are typically soluble, at least at some stage in their use. Generally dyes are often organic compounds whereas pigments are often inorganic compo ...

found in the berries of the plant ''

Clerodendrum trichotomum ''Clerodendrum trichotomum'', the harlequin glorybower, glorytree or peanut butter tree, is a species of flowering plant in the family Lamiaceae. It is native to China, Korea, Taiwan, Japan, India, and the Philippines. It is a large deciduous sh ...

'', which is native to China and Japan. It has a novel chromophore structure which differs from previously studied plant pigments.Iwadare S, Shizuri Y, Yamada K, Hirata Y. Synthesis of trichotomine, a blue pigment obtained from clerodendron trichotomum thunb. ''Tetrahedron''. 1978; 34(10):1457-1459. {{doi, 10.1016/0040-4020(78)80166-5

References

Biological pigments