Color Without Pigment

How spongy keratin nanostructure scatters coherent light into the blues we see on every wing

400–500 nm interference · Barbule cross-section · Dark-field imaging

This is the Feather Microscopy design system, applied by Curio Design — a design-style library for AI agents. Full Feather Microscopy guide → designbycurio.com/learn/feather-structural-microscopy