−orange+ blue

LITColour vision has opponent channels: red against green, blue against yellow, and light against dark (Hering's opponent theory, later found in retinal and LGN cells). Orange's complementary is a blue-cyan. Staring at a saturated colour adapts the cones that see it, and a negative afterimage in roughly the complementary hue appears on a neutral field.

COMPUTEDThe complementary is computed from the CIE 1931 2° diagram: a line from the orange point through D65 white lands on the opposite edge of the locus. MODELThe afterimage is simulated with a simple per-cone gain model (von Kries style), not measured from your eye. Your real afterimage will be fainter and may differ.

stare 8 spick wavelength

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