What color is associated with pheophorbide/pheophytin?

Pheophorbide and pheophytin are both chlorophyll derivatives and are often associated with a color ranging from olive-drab to brownish shades when chlorophyll breaks down. Their presence is typically noted in aging leaves, where they contribute to the color change during processes such as senescence. This occurs when the chlorophyll in plants degrades, which can result in hues less vibrant than the bright greens associated with healthy chlorophyll.

In this context, olive-drab specifically denotes a muted, darker greenish-brown tint that aligns with the color of pheophorbide and pheophytin. Therefore, olive-drab is the most accurate representation of the color associated with these compounds as they contribute to the overall color profile of decaying leaves or plants.