The phrase "a gray one" is correct and usable in written English.
It can be used when referring to an object or item that is gray in color, often to distinguish it from others.
Example: "I would like to buy a gray one instead of the blue one."
Alternatives: "a gray item" or "a gray object".
The upside is I'm so enthusiastic about it - I sold the other two Jeep Cherokees we had in stock to two best friends, then I bought mine - I sold Ms. Linda a white one on 9/11/14, she told Ms. Shelia and referred her to me - I sold her a gray one on 9/16/14 and I bought mine on 9/29/14.
She had three hats; the one she liked best was a gray one with a large white bow on top, and she put that on.
Mr. Bratis was standing next to a rack of his gowns, including a gray one with a draped neck and large blue stars sewn on its sides for luck.
It sometimes has a greenish tint, sometimes a gray one.
Is it a one-off or does it signal a sea-change is thisea-change isw or justhisgray one?
After slipping across the border out of Afghanistan, he unfurled the Taliban's telltale black turban, replacing it with a gray one with white stripes.
That shift of 380 of his employees into a gray one-story building that AT&T had abandoned to cut costs proved to be just the beginning.
Kling modelled a gray one-piece with a plunging V-neck, belted under the bust ($445), and a winsome black strapless suit with drawstrings down the sides that can be tightened at the thigh for a shirred effect ($410).
In the North Highlands section of Sacramento County northeast of here, where the Soltys family lived in a gray, one-story duplex with flowers left by grieving friends in the driveway, neighbors said Mrs. Soltys looked depressed.
Both teenagers ended up in Irwin County Detention Center, a gray one-story building in the 3,400-person 3,400-personla, Georgia.
Tess's eye was drawn to a miniature version of Esskay, a prancing greyhound, a true gray one, whereas Esskay was black with a patch of white at her breast.
