When you look at a peacock from different angles, you’ll notice something magical — its feathers shimmer and seem to change color. Sometimes they appear deep blue, other times green or bronze, even though the bird hasn’t moved much. What causes this dazzling display? It’s not ordinary pigmentation, as with paints or dyes. The answer lies in a fascinating phenomenon of physics known as structural coloration . This blog dives deep into the science behind this optical trick , how it works in peacocks, and where else it shows up in nature. The Illusion of Color: Pigments vs. Structures Before we explore the peacock’s feathers, let’s understand how color normally works. Most objects appear colored because they contain pigments — chemical substances that absorb certain wavelengths of light and reflect others. For example, a green leaf absorbs red and blue light, reflecting green, which is why it looks green to our eyes. However, there is another way color can be produced — with...