Why blue food is so rare?

To be healthy we should eat food with variety of colours. But there is one exception, blue colour. Blue coloured food is so rare—and if there is blue food on the plate, I guess it will be unappetizing to eat. How about blueberry? Blueberry is yummy, isn’t it? The thing is blueberry is not actually blue—yes the outside is blue—but the inside is more like purple. In fact, the colour of blueberry is changing depending on the acidity of the environment.

So why does blue is so rare in plants?

Read More