You might be surprised to hear that black beans are actually so blue that they appear black. Black beans are full of anthocyanins, a powerful group of flavanoids that also makes blueberries, purple cabbage and red onions so nutritious.

What color are black beans?

Black beans are a small, oval-shaped dried bean. As you'd expect, they are black in color, though cooked beans have a slightly purplish hue. Dried black beans have a deep, dark color.

Why are my black beans blue?

When I started shelling them I was very pleased to see some distinctive blue color. As the beans age and dry down, they start to produce some tan pigment which muddies up the pretty blue. ... All together, this suggests that black beans really are just super-dark blue beans.