achromatic colour

Noun
  1. A color lacking hue;
    White or grey or black (synset 104967256)
    is a type of: color, coloring, colour, colouring - a visual attribute of things that results from the light they emit or transmit or reflect
    subtypes:
    • black, blackness, inkiness - the quality or state of the achromatic color of least lightness (bearing the least resemblance to white)
    • white, whiteness - the quality or state of the achromatic color of greatest lightness (bearing the least resemblance to black)
    • gray, grayness, grey, greyness - a neutral achromatic color midway between white and black
    same as: achromatic color

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