Interesting Things with JC #803: "The Black Jalapeno Chronicles" takes you on a spicy journey through the color transformation of jalapenos, from vibrant green to intriguing black, culminating in fiery red. Nature's artistry is revealed as anthocyanin pigments and capsaicin accumulation work their magic.

Ref - https://peppergeek.com/jalapeno-peppers-turning-black/