Buttoned Hewn Sky

Old French bouton, button — past-participle of button. As a color modifier, buttoned implies a clear-and-fastened-and-formal quality, the crisp color of Edwardian-period formal-attire fully-fastened-and-formally-dressed gentleman's-attire. Sits at the crisp-and-finished end of the grid, parallel to trim and pressed in usage.

Old English hēawan, to-hew. As a color modifier, hewn implies a hand-cut-stone-or-timber quality, the visual register of hand-hewn-stone-and-timber hand-cut-and-shaped stone-and-timber-and-log hand-hewn-construction-and-craft surfaces under hand-hewn stone-and-timber workshop-light. Sits at the modifier-and-texture end of the grid, parallel to carved and cast in usage.

The blue of a clear sky at noon — produced by Rayleigh scattering, the preferential dispersion of shorter wavelengths through atmospheric molecules. Air itself is colorless; the color we see is sunlight scattered toward our eyes by every cubic kilometer above. The reference shade is mid-latitude noon under a high pressure system: a clean, slightly green-shifted blue with the luminous depth of light scattered across an entire hemisphere of air.