A freeper posted an article about purple photosynthesis (or violet) and the hypothesis that extraterrestrial plants/protists could be purple (or violet) because violet has more energy. But the article also mentioned that the energy could be too much for the plant which is why green plants/algae are dominant now (as a Creationist, consider that idea bunk--the ratio of many green photosynthesizers and few purple photosynthesizers probably was the case since they were created).
Anyway, if purple photosynthesis was too much for plants, black (absorbing at least almost all of the visible spectrum) would be even more energy for plants.