Structural color is a phenomenon where color is produced not by pigments, but by microscopic structures that reflect light in specific ways. This can be seen in nature, such as in the wings of butterflies or the feathers of peacocks, where the arrangement of tiny scales or fibers creates vibrant colors through interference and diffraction of light. Unlike traditional colors that absorb certain wavelengths and reflect others, structural colors can change depending on the angle of light or the viewer's perspective. This unique property is also being studied for applications in materials science and photonic devices, where creating colors without dyes could lead to more sustainable products.