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Adjective: colorless  kú-lur-lus
Usage: US (elsewhere: colourless)
  1. Lacking in variety and interest
    "a colorless and unimaginative person";
    - colourless [Brit, Cdn]
  2. Weak in color; not colorful
    - colourless [Brit, Cdn]

See also: achromatic, ashen, blanched, bleached, bloodless, color [US], colour [Brit, Cdn], drab, dull, dulled, etiolate, etiolated, faded, grayed [US], greyed [Brit, Cdn], hebetudinous [rare], livid, lurid, neutral, pale, pallid, pastelike, pastie, pasty, prefaded, sober, somber [US], sombre [Brit, Cdn], vividness, wan, washed-out, washy, waxen, waxlike, waxy, white, whitened

Antonym: colourful [Brit, Cdn]

Encyclopedia: Colorless