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  1. Wavelengthapprox. 450–495 nm
    Frequency~670–610 THz
    Hex triplet#0000FF
    sRGB (r, g, b)(0, 0, 255)
  1. Blue Definition & Meaning - Merriam-Webster

  2. Blue Color: Psychology, Meaning and Symbolism

  3. The Color Blue: Meaning, Color Psychology, Effects - Verywell Mind

  4. Blue - Color Matters

  5. blue
    ADJECTIVE
    blue (adjective) · bluer (comparative adjective) · bluest (superlative adjective)
    1. of a color intermediate between green and violet, as of the sky or sea on a sunny day:
      "the clear blue sky" ·
      "a blue silk shirt" · "deep blue eyes"
      synonyms:
      sky blue · azure · cobalt (blue) · sapphire · cerulean · navy (blue) ·
      ultramarine · lapis lazuli · indigo · aquamarine · turquoise · teal (blue) · cyan · saxe (blue) · Oxford blue · Cambridge blue · of the color of the sky · of the color of the sea
      • (of a person's skin) having turned blue as a result of cold or breathing difficulties:
        "Annie went blue, and I panicked"
      • (of a bird or other animal) having blue markings:
        "a blue jay"
      • (of cats, foxes, or rabbits) having fur of a smoky gray color:
        "the blue fox"
      • (of a ski run) of the second lowest level of difficulty, as indicated by colored markers positioned along it.
      • physics
        denoting one of three colors of quark.
    2. informal
      (of a person or mood) melancholy, sad, or depressed:
      "he's feeling blue"
      antonyms:
    3. informal
      (of a movie, joke, or story) with sexual or pornographic content:
      "the blue movies are hugely profitable"
      antonyms:
      • (of language) marked by cursing, swearing, and blasphemy.
    4. informal
      dated
      rigidly religious or moralistic; puritanical.
    NOUN
    blue (noun) · blues (plural noun) · Blue (noun) · the blue (noun)
    1. blue color or pigment:
      "she was dressed in blue" ·
      "the dark blue of his eyes" · "armchairs in pastel blues and greens"
      • blue clothes or material:
        "Susan wore blue"
      • (Blue)
        the Union army in the Civil War, or a member of that army.
      • another term for bluing
      • a blue ball, piece, etc., in a game or sport.
      • literary
        (the blue)
        the sky or sea, or the unknown:
        "a lark went trilling up, up into the blue"
    2. a small butterfly, the male of which is predominantly blue while the female is typically brown.
    VERB
    blue (verb) · blues (third person present) · blued (past tense) · blued (past participle) · blueing (present participle)
    1. make or become blue:
      "the light dims, bluing the retina" ·
      "blued paper" · "the day would haze, the air bluing with afternoon"
      • heat (metal) so as to give it a grayish-blue finish:
        "nickel-plated or blued hooks"
    2. historical
      wash (white clothes) with bluing:
      "they blued the shirts and starched the uniforms"
    ORIGIN
    Middle English: from Old French bleu, ultimately of Germanic origin and related to Old English blǣwen ‘blue’ and Old Norse blár ‘dark blue’.
    blue
    VERB
    BRITISH ENGLISH
    informal
    dated
    blue (verb) · blues (third person present) · blued (past tense) · blued (past participle) · blueing (present participle)
    1. squander or recklessly spend (money):
      "they blued it all on sweets, toys, and cigarettes"
    ORIGIN
    mid 19th century: perhaps a variant of blow.
    More about blue
  6. The History of the Color Blue: From Ancient Egypt to …

    WEBFeb 12, 2018 · Learn how the color blue evolved from ancient Egypt to the latest scientific discoveries. Explore the origins, meanings, and uses of different shades of blue in art and culture, from Egyptian blue to YInMn. …

  7. The Secret History of the Color Blue — Google Arts & Culture

  8. Shades of blue - Wikipedia

    WEBDefinitions of blue. Tints, shades, and variations of blue. Ambiguous variations of blue. Shades of azure. See also. References. Shades of blue. Varieties of the color blue may differ in hue, chroma (also called …

  9. Meaning of the Color Blue: Symbolism, Common Uses, …

    WEBAug 11, 2023 · Blue is the color of trust, responsibility, and relaxation. It has different meanings in different cultures, the Bible, and psychology. Learn about the symbolism, uses, and effects of blue in various contexts and …

  10. Blue | Description, Etymology, & Facts | Britannica