Wiktionary
noncolor
n. That which is not a color.
Usage examples of "noncolor".
Bright spots of noncolor danced in Mars's head and he felt himself begin to black out.
In her vision now was the hideous noncolor of the evil that gripped Lan's mind.
He groaned and tossed the remote to a cushion of his fashionably noncolored love seat.
He looked away, at his pale, grey, characterless furniture, the weepy neutral carpet and noncolored walls.