True Rain Emerald

Old English trēowe, faithful — used as a color modifier since the seventeenth century for hues that read as the canonical version of their family. True red, true blue: the saturation is full, the hue is neither shifted nor adulterated. Sits at the center of the bold and crisp buckets, marking the unequivocal middle of any chromatic family.

Old English regn, rain-or-shower. As a color modifier, rain implies a rain-shower-and-wet-and-Atlantic-front quality, the visual register of Atlantic-front-rain-and-monsoon-rain hand-rain-shower-and-wet-and-Atlantic-front Atlantic-front-rain-and-monsoon-rain-and-Lake-District-deluge rain-and-rain-shower-and-wet surfaces under Atlantic-front-rain-and-monsoon-rain-and-Lake-District-deluge Cumbrian-fells-and-Borrowdale-and-Snowdonia Atlantic-rain-light. Sits at the modifier-and-weather end of the grid, parallel to sleet and flurry in usage.

A chromium-tinged variety of beryl — the gemstone mined from the Cleopatra-era Mons Smaragdus in Egypt, the Muzo deposits of Colombia, and the Sandawana mines of Zimbabwe. Emerald green refers to a high-clarity faceted emerald with strong color saturation: a saturated, slightly blue-shifted green with the gem's signature internal life. Cooler than fern, warmer than teal, with the heraldic weight of two thousand years of royal favor.