Complexion, characteristic of a resident of the «black» or «yellow» ethnicity, will be a sign of Addison's disease or icterus in the «white» one; a violet shade of the tone of the lips, bluish nails in Caucasians the physician would assess as cyanosis, in the Negro - as an ethnic feature. (star-writers.com)
Jaundice, also known as icterus, is a yellow pallor or discoloration of the whites of the eyes, the skin, and the gums and other mucus membranes. (web-dvm.net)
When this enzyme does not work, bilirubin levels build up, leading to severe chronic icterus (jaundice) and becoming toxic to the brain. (afm-telethon.com)