What color is biliverdin, and what color is bilirubin?

Biliverdin is a green pigment that is produced from the breakdown of heme, a component of hemoglobin in red blood cells. Its color can be described as greenish. When biliverdin is further metabolized, it is converted to bilirubin, which has a yellow to orange color. This transition is important in the process of heme catabolism, and the distinct colors of biliverdin and bilirubin play a role in diagnostics and indicate various physiological states, such as liver function and hemolytic processes.

In choosing the correct option, it reflects the natural progression of these pigments in the body and highlights their respective colors: biliverdin being greenish and bilirubin being yellow to orange.