Cleansed Pict Sky

Old English clǣnsian, to make clean — past-participle of cleanse. As a color modifier, cleansed implies a clear-and-purified quality where the hue has been stripped of any contaminating tint. Sits at the crisp-and-clear end of the grid, parallel to fresh and pristine in usage.

Latin Picti, painted-people. As a color modifier, pict implies a pre-Christian-Caledonian quality, the visual register of Pictish-Caledonia hand-carved Pictish-symbol-stone Pictish-and-Caledonian pre-Christian-Caledonian surfaces under Pictish-Caledonia early-Christian-and-pre-Christian Highland light. Sits at the modifier-and-cultural end of the grid, parallel to celtic and scot 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.