World of Color
There are no known bird species that produce blue-pigmented feathers. The color we perceive them to be is due to the structure of their feathers, which reflect light in a way that makes them appear blue. But what is “actually” blue, anyway? Is there such a thing? To answer that, we have to explore the very nature of color: what it is, how we perceive it and how we use it. Read part 1 in our World of Color series.