monochromatic

/ˌmɑnəkrəˈmætɪk/
adjective
  1. Having or using only one color or shades of one color.
    • The old photograph was monochromatic, showing only sepia tones.
    • She decorated her bedroom in a monochromatic gray scheme.
    • The artist's monochromatic painting used only shades of blue.
  2. Lacking variety or interest; dull and uniform.
    • His monochromatic wardrobe of black and gray felt boring to his friends.
    • The lecture was monochromatic, with no change in tone or pace.
    • The movie's monochromatic plot failed to capture the audience's attention.
  3. Consisting of light of a single wavelength or a very narrow range of wavelengths.
    • Scientists used a monochromatic light source to study the crystal's properties.
    • The experiment required monochromatic radiation to get accurate results.
    • A laser produces a monochromatic beam of light.