The quality or state of being gray in color, tone, or mood.
From 'gray' (Old English 'græg') plus the suffix '-ness' (Old English '-nes'), which converts adjectives into abstract nouns. The compound has been used since Middle English to describe the abstract quality of grayness.
Grayness is one of the few colors that's almost more interesting in the abstract—it represents ambiguity, neutrality, and melancholy all at once, which is why poets love it way more than painters do!
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