Glaucous
Adjective.
1 a: of a pale yellow-green color. b: of a light bluish-gray or bluish-white color.
2: having a powdery or waxy coating that gives a frosted appearance and tends to rub off.
– glaucousness, noun.
[Origin: Latin glaucus, from Greek glaukos gleaming, gray]
(1671)
“Suddenly, a wave of very big rats, with glaucous eyes and lips drawn back from shining ridges of teeth, came boiling out of the darkness.” – The Wicked, Douglas Nicholas.
And, some other nifty color words:
Murrey / Perse / Cramoisy
Murrey, noun: a purplish black: Mulberry. [Origin: Middle English, from Anglo-French muré, from Medieval Latin moratum, from neuter of moratus mulberry colored, from Latin morum, mulberry.] (15th Century).
“Fastened to his surcoat was a brooch worn as a badge: a silver disk inlaid with murrey-colored enamel, against which the white fountain of Blanchefontaine stood out, rendered in raised silver.” – Something Red, Douglas Nicholas.
Perse, adjective: of a dark grayish blue resembling indigo. [Origin: Middle English pers, from Anglo-French, from Medieval Latin persus.] (15th Century)
Cramoisy: adjective: of a crimson colour. noun: crimson cloth.
[Origin: French cramoisi, from Spanish carmesi, from Arabic qirmzi, equivalent to kermes.] (1375 -1425)
“She took the cramoisy gown from his hand and folded it, and then held the perse up against herself, looking down at it.” – Something Red, Douglas Nicholas.