(n.) The quality of being gray.

abruptness absence of color acedia achromaticity achromatism adynamia aloofness analgesia anemia anesthesia angst anguish anxiety apathy aridity aridness ashiness asininity ataraxia ataraxy atony autism barrenness benumbedness blah blah feeling blahs blockishness bloodlessness bluffness bluntness boobishness boorishness boredom boringness bovinity cachexia cachexy cadaverousness callousness canescence catatonia cheerlessness chill chilliness chloranemia cloddishness cold blood cold heart coldness colorlessness coma comatoseness commonness commonplaceness coolness cowardice crassness crudeness deadness deadpan dearth of ideas deathly hue deathly pallor debilitation debility denseness density detachment dim-wittedness dimness discomfort discomposure discontent disinterest dislike dispassion dispassionateness displeasure disquiet dissatisfaction doltishness drabness dread drowsiness dryness dull-wittedness dullardism dumbness duncery easy temper electronarcosis emotional deadness emotionlessness emptiness enervation ennui etiolation even temper existential woe exsanguination fadedness faintness fairishness fairness fatigue feebleness flabbiness flaccidity flatness frigidity frostiness ghastliness glaucescence glaucousness good temper gray grayishness grayness grimness grossness haggardness heartlessness heaviness hebetude hopelessness huelessness humdrumminess humdrumness hypochromia hypochromic anemia iciness immovability impassibility impassiveness impassivity imperception imperceptiveness imperceptivity impercipience imperturbability imperturbableness impotence inanimation inappetence inconsiderateness indifference inexcitability inexcitableness infecundity infertility inirritability inquietude insensibility insensibleness insensitiveness insensitivity insentience insipidness insouciance irksomeness jadedness joylessness lack of affect lack of appetite lack of bite lack of feeling lack of pleasure lack of touch lackadaisicalness lackluster languidness languishment languor languorousness lassitude leadenness lenitude lentor lethargicalness lethargy lifelessness lightness listlessness lividity lividness long-windedness loutishness lumpishness malaise matter-of-factness mediocreness mediocrity middlingness moderateness modestness modesty monotonousness mousiness muddiness muffled tone mutedness narcosis narcotization nausea neutral tint ninnyism nonchalance nongratification nonsatisfaction numbness oafdom oafishness objectivity obtundity obtuseness opacity oscitancy painfulness paleness pallidity pallidness pallor passableness passionlessness passiveness passivity pastiness patience phlegm phlegmaticalness phlegmaticness pins and needles plainness plucklessness poker face prison pallor prolixity prosaicism prosaicness prosaism prosiness prostration resignation resignedness respectability sallowness satedness savorlessness self-absorption sickliness sickly hue silveriness simpletonianism