Noun grayness has 1 sense
  1. gray, grayness, grey, greyness - a neutral achromatic color midway between white and black
    --1 is a kind of achromatic color, achromatic colour
    --1 has particulars:
     ash gray, ash grey, silver, silver gray, silver grey; charcoal, charcoal gray, charcoal grey, oxford gray, oxford grey; dapple-gray, dapple-grey, dappled-gray, dappled-grey; iron-gray, iron-grey; tattletale gray, tattletale grey; iron blue, steel gray, Davy's gray