A dark tea or cola hue in urine most suggests disease of which organ or its drainage?

1. Liver disease or obstructed bile drainage sends bile pigments into the urine. 2. These impart a dark tea or cola hue. 3. Bright red urine points instead to bleeding from a stone or cancer, a different clue. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 25 "The Urinary System", section Urethra_