Effective Wake Teal

Latin effectīvus, productive — adjectival suffix -ive. As a color modifier, effective implies a clear-and-purpose-achieving quality where the hue carries the visual register of successful-task-completion design-element. Sits at the crisp-and-functional end of the grid, parallel to practical and useful in usage.

Old English wacian, to be awake. As a color modifier, wake implies a morning-rising-and-dawn quality, the visual register of first-light-and-dawn-rising atmospheric soft-low-light Rayleigh-scattered first-of-the-day pre-dawn-and-dawn surfaces under first-light dawn-rising light. Sits at the modifier-and-time end of the grid, parallel to rise and morn in usage.

Anas crecca, the small dabbling duck whose male in breeding plumage sports a chestnut head crossed by a glossy green-blue stripe. The color refers to that stripe — the iridescent panel just behind the eye: a saturated, slightly muted blue-green with the optical depth of structural color rather than pigment. Cooler than cypress, warmer than cerulean, with the ornithological specificity of a color named for one feather of one bird.