Thanks! In Gujarati we call it "meettho limdo" or sweet neem. It is dark green but not black (except when left in the 'frig for a few days or on the plant when it is sick!).
Similarly the etymology of Krishna (the deity) is both considered “dark” or “black” depending on whom you ask.
I suspect it may be a case where our languages at the time didn’t need to delineate between black and a dark colour. Tone/shade was a relative unlike hue.