Functional Gold Peacock

Latin fūnctiō, performance — adjectival suffix -al. As a color modifier, functional implies a clear-and-purpose-fit-and-utilitarian quality, the crisp color of Mid-Century-Modern and Bauhaus form-follows-function design-aesthetic. Sits at the crisp-and-functional end of the grid, parallel to practical and utilitarian in usage.

Old English gold, gold. As a color modifier, gold implies a precious-malleable-metal quality, the visual register of hand-beaten-and-rolled-gold hand-beaten-gold-leaf-and-coin-and-bar Egyptian-and-Italian-Renaissance hand-beaten-gold-leaf surfaces under Egyptian-and-Renaissance hand-beaten-gold-leaf treasury-light. Sits at the modifier-and-texture end of the grid, parallel to gilt and gloss in usage.

Pavo cristatus, the Indian peafowl whose male displays the most elaborate sexual ornament in birds — a fan of two-meter eyespotted tail feathers in iridescent blue-green. The color is structural, not pigmented: created by interference patterns in the feather barbules. Peacock blue refers to the dominant body color: a saturated, slightly muted teal-blue with the optical depth of structural color. Cooler than persian, warmer than sapphire.