The white-tailed deer is tan or brown in the summer and grayish brown in winter.
From the newsobserver.com
Roof insulation was shredded on the lawns, leaving a grayish layer on the grass.
From the orlandosentinel.com
Males have black and white feathers while the female has grayish brown feathers.
From the en.wikipedia.org
They are born brownish coloured and tend to turn more grayish coloured with age.
From the en.wikipedia.org
The building is made of the same grayish-brown slate of the rock it rests upon.
From the businessweek.com
It usually manifests itself as a grayish-white coating on the upper leaf surface.
From the post-gazette.com
The eyes are grayish blue, the goatee trim, the long dark hair flecked with gray.
From the nytimes.com
But the worst cases turn bears completely bald, exposing a grayish, bumpy skin.
From the orlandosentinel.com
Even Hong Kong's skies were grayish rather than blue when I landed here Sunday.
From the dailyherald.com
More examples
Grey: of an achromatic color of any lightness intermediate between the extremes of white and black; "the little grey cells"; "gray flannel suit"; "a man with greyish hair"
Grey (often spelled gray in the U.S., see spelling differences) describes the colors ranging from black to white. These, including white and black, are known as achromatic colors or neutral colors. These "new" neutrals have low colorfulness and chroma.