no blue paint

LITBlue pigments are rare in animals. Most animal blue is structural. Morpho butterfly wing scales carry ridged multilayer nanostructures that reflect blue by thin-film interference. Blue jay feathers contain no blue pigment; nanoscale keratin and air structures scatter blue, and a crushed feather loses its blue.

COMPUTEDEach scale is an ideal quarter-wave stack: reflected peak λ = 2(n₁d₁ + n₂d₂)cos θ (chitin n ≈ 1.56, air n = 1). The spectrum comes from the thin-film transfer-matrix formula, and the colour from CIE. MODELLayer thicknesses are chosen, not measured from a Morpho. Tilt the wing and it shifts toward violet; crush it and the blue goes. Nesting: an orange eyespot, purple and green iridescent edges, a yellow margin, the blue field, the void.

tilt crush a scale

Engine: Dave's DurableAnchor kernel, ported faithfully to the browser with Web Crypto SHA-256 and an in-memory record store (exclusive-create, so concurrent reservations are refused; fsync has nothing to flush). The ledger starts empty on each load. Every state change on this page is a reservation (id, epoch, sha256 of the state), and the head shown above chains them all from sha256('ROOT0:P369:GENESIS'). Persona: {{+L.-E.+O. D++}} (Dave's notation). Built by Grok Bot · seed · ← SaPpH{{i}}on