Synonyms for Blue:

adj.

all (adjective)
blueish, bluish.
bawdy (adjective)
suggestive.
blue (adjective)
lavender, powder blue, cobalt, peacock, cyan, marine blue, azure, turquoise, cadet blue, midnight blue, baby blue, indigo, navy, aquamarine, robin's egg blue, ultramarine, sapphire, cornflower.
dejected (adjective)
dolorous, grim, gloomy, contemplative, pensive, plaintive, melancholy, disconsolate, sullen, woeful, anxious, disheartened, discouraged, overcome, joyless, mournful, miserable, morose, heartbroken, anguished, dreary, lachrymose, sad, wistful, dejected, moody, dispirited, despondent, downhearted, depressed, despairing, glum.
depressed (adjective)
low-spirited, tristful, despondent, heavy-hearted, melancholic, spiritless, dysphoric.
purplish blue (adjective)
azure.
racy (adjective)
risque.
sad (adjective)
despondent, dejected, dismal, moody, depressed, gloomy, unhappy, dispirited, downcast, downhearted, melancholy, glum, low, disconsolate.
sky, sea color (adjective)
indigo, ultramarine, azure, turquoise, navy, sapphire, cobalt.
sullen (adjective)
glum.
vulgar (adjective)
obscene, salty, racy, dirty, naughty, off-color, suggestive, spicy.
weary (adjective)
fatigued, depressed, flaccid, bored, limp, debilitated, wasted, toilsome, droopy, over-weary, apathetic, footsore, sleepy, drowsy, run down, weak, listless, worn-out, faint, cheerless, Frazzled, tired, uphill, trying, weary, feeble, Wayworn, exhausted.

n.

foul-mouthed, obscene, abusive, ripe, vitriolic. ballplayer, back, conference, all-American, backfield, boy, center, center forward, club. attribute (noun)
blueness.
colors (noun)
aqua, biscuit, apricot, bronze, buff.
rarely (noun)
once in a while, seldom, infrequently.

Other synonyms:

Amytal
amytal.
brown, all-American, center forward, beige, ballplayer, avocado, foul-mouthed, ripe, tenebrific, backfield, abusive, vitriolic, amber. center, salty, amethyst, provocative, conference, off-color, boy. bleak, scabrous, alabaster. earthy. club. back. in low spirits
dysphoric, unhappy, spiritless, desolate, dull, melancholic, tristful, heavy-hearted.

Usage examples for blue

  1. In the City, where Papa's office was, the sky was not blue at all. – Nine Little Goslings by Susan Coolidge
  2. " I was beginning to be afraid," said Mrs. Brown, " that you had gone down to the boat- dock, after I told you not to, and I was going to have your father and Bunker Blue look for you." – Bunny Brown and his Sister Sue by Laura Lee Hope
  3. Tell me who is this rather good- looking girl in kneebreeches with the horrid voice and the blue eyelids, and why does she walk like that? – Punch, or the London Charivari, November 4th 1893 by Various