alchymista:

In a world with two or three suns, plants might turn black, according to a new research study. It’s not because the extra suns would fry the vegetation to a crisp; rather, the plants’ color might change depending on how much of the visible light spectrum they absorbed for energy. In a multi-star system, plants depending on dim red dwarf stars for energy might evolve to absorb all colors of light. The result? Plants that appear black as night to the human eye.