yellow / blue

LITIn opponent-colour theory, one channel compares yellow, the summed long- and medium-wave cones (L+M), against blue (S). Yellow is the hue that looks neither reddish nor greenish, and unique yellow lies near 575–580 nm for most observers. Sodium's D lines at 589.0/589.6 nm sit just past it, on the orange side.

COMPUTEDThe cone signals come from the CIE XYZ to LMS conversion (the Hunt–Pointer–Estévez matrix). The yellow–blue signal is (L+M)/2 − S, and red–green is L − M. The slider sweeps a single wavelength; the plot shows where red–green crosses zero (unique yellow by this simple model) and where sodium falls. Nesting: an orange D-line core, purple and green wings, yellow the zero crossing, void beyond.

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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