Name of a grayish-green color; can function as an uncountable mass noun or as a countable shade.
The uniform was a dull gray-green.
Униформа была тусклого серо-зелёного.
Color adjective denoting a mixture of gray and green; not normally gradable.
She chose a gray-green paint for the kitchen walls.
Она выбрала серо-зелёную краску для стен кухни.