Plain Knot Verdigris

Latin planus, flat, level — used as a color modifier since the medieval period for hues that read as undecorated and direct. Plain white, plain blue: moderate saturation, no shift, no surface effect. Sits in the crisp-bucket center, with the implication of restraint rather than absence.

Old English cnotta, knot. As a color modifier, knot implies a sailor's-rope-knot quality, the visual register of Royal-Navy-and-merchant-marine-knot hand-tied sailor's-rope-and-line bowline-and-figure-eight-and-clove-hitch maritime-rigging surfaces under tall-ship-and-frigate sailor's-knot-and-line working light. Sits at the modifier-and-nautical end of the grid, parallel to sheet and spar in usage.

The basic copper carbonate that forms on weathered copper and bronze — the pigment scraped from oxidized metal and used in Renaissance painting before being supplanted by more stable greens. The color refers to a thick verdigris on aged copper roofing or the Statue of Liberty's surface: a soft, slightly muted blue-green with the powdery finish of mineral oxide. Cooler than patina, warmer than seafoam, with the archaeological weight of a mineral made by time.