Chivalrous Flash Cerulean

Old French chevaleros, knightly — adjectival suffix -ous, derived from cheval (horse). As a color modifier, chivalrous implies a saturated-and-knightly-and-gallant quality, the deep-rich color of medieval-Romance chanson-de-geste hero-and-troubadour song tradition. Sits at the bold-and-chivalrous end of the grid, parallel to gallant and knightly.

Middle English flasshen, to-splash-or-burst. As a color modifier, flash implies a sudden-and-bursting-and-bright quality, the visual register of lightning-strike-and-camera-flash hand-sudden-and-bursting-and-bright lightning-strike-and-camera-flash-and-magnesium-powder flashed-and-sudden-and-bursting surfaces under lightning-strike-and-camera-flash-and-magnesium-powder split-second-burst storm-cloud-and-studio-light. Sits at the modifier-and-mood end of the grid, parallel to spark and blaze in usage.

From the Latin caeruleum, originally referring to dark blue paint pigment of the Roman world, then via French céruléen into English. As a modern art-supply name, cerulean blue is the cobalt-tin oxide pigment introduced in 1805. The color refers to a clean, slightly green-shifted blue with the matte finish of mineral pigment in linseed oil: lighter than cobalt, deeper than aqua, with the painter's weight of a word for sky.