Invisible green

a very dark shade of green, approaching to black, and liable to be mistaken for it.

See also: Invisible

References in classic literature ?
The first was a sky- blue, in the vain expectation that the eye might be cheated into the belief it was the heavens themselves that hung so imposingly over Marmaduke’s dwelling; the second was what he called a “cloud-color,” being nothing more nor less than an imitation of smoke; the third was what Richard termed an invisible green, an experiment that did not succeed against a background of sky.
To one lie, second class; damaged black cloth sold for invisible green.
Jan solved the problem of the obtrusive new walls by using Invisible Green paint.
All you see are bunkers, which is not a good mental image when you're trying to hammer a three-metal to an invisible green.
Pride of place belongs to Thoreau, who gives Revell his title: "Methinks my own soul must be a bright invisible green.
Half a page of one-liners from Invisible Green would provide enough material for a semester's worth of discussion in any poetry class.
Invisible Green continues a long tradition in American letters, the tradition of the isolato, listening to and gazing out upon the world, who, in his or her isolation, is simultaneously in communion with others.
The clever formulation has invisible green pigments through it to stop that hideous orange glow.
When I behold that dull yellowish green I wonder if my own soul is not a bright invisible green.
He is, as he himself avowed--"I witness and wait"--a Self gone over to Soul, a small green bittern's eye gone all the way over to invisible green.
Walt Whitman or, if you prefer, the soulful ground Walt Whitman has become, shone invisible green in the real grass at Pisa.