Open English Wordnet
Nouns
Adjectives
(s)black, dark, sinisterstemming from evil characteristics or forces; wicked or dishonorable“black deeds”, “a black lie”, “his black heart has concocted yet another black deed”, “Darth Vader of the dark side”, “a dark purpose”, “dark undercurrents of ethnic hostility”, “the scheme of some sinister intelligence bent on punishing him” (Thomas Hardy)
(s)dark, dour, glowering, glum, moody, morose, saturnine, sour, sullenshowing a brooding ill humor“a dark scowl”, “the proverbially dour New England Puritan”, “a glum, hopeless shrug”, “he sat in moody silence”, “a morose and unsociable manner”, “a saturnine, almost misanthropic young genius” (Bruce Bliven), “a sour temper”, “a sullen crowd”
(s)blue, dark, dingy, disconsolate, dismal, gloomy, grim, sorry, drab, drear, drearycausing dejection“a blue day”, “the dark days of the war”, “a week of rainy depressing weather”, “a disconsolate winter landscape”, “the first dismal dispiriting days of November”, “a dark gloomy day”, “grim rainy weather”