vividness,
color,
colour the appearance of objects (or light sources) described in terms of a person's perception of their hue and lightness (or brightness) and saturation
ashen,
blanched,
livid,
bloodless,
white anemic looking from illness or emotion; "a face turned ashen"; "the invalid's blanched cheeks"; "tried to speak with bloodless lips"; "a face livid with shock"; "lips...livid with the hue of death"- Mary W. Shelley; "lips white with terror"; "a face white with rage"
bleached,
faded,
washed-out,
washy having lost freshness or brilliance of color; "sun-bleached deck chairs"; "faded jeans"; "a very pale washed-out blue"; "washy colors"
somber,
sombre,
drab,
sober grave or even gloomy in character; "solemn and mournful music"; "a suit of somber black"; "a somber mood"
greyed,
dulled deprived of color; "colors dulled by too much sun"; "greyed with the dust of the road"
etiolate,
etiolated,
blanched (especially of plants) developed without chlorophyll by being deprived of light; "etiolated celery"
lurid shining with an unnatural red glow as of fire seen through smoke; "a lurid sunset"; "lurid flames"
pallid,
wan,
pale lacking vitality as from weariness or illness or unhappiness; "a wan smile"
pastelike,
pasty resembling paste in color; pallid; "he looked pasty and red-eyed"; "a complexion that had been pastelike was now chalky white"
prefaded (of fabric or clothing) having been given a faded (weathered) appearance by artificial means
waxlike,
waxen,
waxy having the paleness of wax; "the poor face with the same awful waxen pallor"- Bram Stoker; "the soldier turned his waxlike features toward him"; "a thin face with a waxy paleness"
colourless -
lacking in variety and interest; "a colorless and unimaginative person"; "a colorless description of the parade"