Bile is a physiological fluid that is dark green to yellowish-brown in color and produced by the liver.
In humans, bile is produced continuously by the liver and drained by bile canaliculi to the right and left hepatic ducts. The right and left hepatic ducts join to form the common hepatic duct. The cystic duct from the gall bladder joins the common hepatic duct and forms the common bile duct.