Colors with Undefined Names

94. Urobilin Color 978 - #E1AD21

Urobilin or urochrome is a yellow biochemical linear tetrapyrrole compound. Urobilin and its related compound, urobilinogen, are degradation products of the cyclic tetrapyrrole heme, and is primarily responsible for the yellow color of urine.

Urobilin is generated from the degradation of heme, which is first degraded through biliverdin to bilirubin. Bilirubin is then excreted as bile, which is further degraded by microbes present in the large intestine to urobilinogen, and reabsorbed into the bloodstream, where it is converted into urobilin and eventually excreted by the kidneys.