Acheronian, Acherontic, Cimmerian, Quaker-colored, Stygian, acier, apocalyptic, ashen, ashy, bad, baleful, baneful, black, blackish, bleak, bodeful, boding, caliginous, canescent, cinereous, cinerous, clouded, cloudy, creamy, dapple-gray, dapple, dappled-gray, dappled, dark-colored, dark, dark and gloomy, darkish, darksome, dead, deadened, decorous, delicate, demure, depressing, depressive, dim, dingy, dire, dismal, dispiriting, doomful, dove-colored, dove-gray, drab, drear, drearisome, dreary, dull, dusk, dusky, dusty, earnest, eggshell, evil-starred, evil, fateful, flat, foreboding, formal, frowning, funebrial, funereal, glaucescent, glaucous, gloomful, glooming, gloomy, gloss, grave, gray-black, gray-brown, gray-colored, gray-drab, gray-green, gray-spotted, gray-toned, gray-white, gray, grayed, grayish, grim-faced, grim-visaged, grim, griseous, grizzle, grizzled, grizzly, ill-boding, ill-fated, ill-lighted, ill-lit, ill-omened, ill-starred, ill, inauspicious, iridescent, iron-gray, lackluster, lead-gray, leaden, lifeless, light, livid, long-faced, lowering, lusterless, mat, mellow, menacing, mother-of-pearl, mouse-colored, mouse-gray, mousy, murky, nacreous, nigrescent, no-nonsense, obscure, of evil portent, ominous, opalescent, overcast, pale, pastel, patinaed, pearl-gray, pearl, pearly, portending, portentous, quiet, sad, saturnine, sedate, semigloss, serious, silver-gray, silver, silvered, silvery, simple, sinister, slate-colored, slaty, smoke-gray, smoky, sober-minded, sober, sobersided, soft-colored, soft-hued, soft, softened, solemn, sombrous, staid, steel-gray, steely, stone-colored, stone-faced, stormy, straight-faced, subdued, subtle, swart, swarthy, sweet, taupe, tender, tenebrous, thoughtful, threatening, triste, unfavorable, unfortunate, unlucky, unpromising, unpropitious, unsmiling, untoward, wan, weariful, wearisome, weary, weighty