A color or pigment varying around a light grey-brown color(noun)
WordNet. Princeton University. 2010.
Use "greyish brown" in a sentence
"The surface of the land uneven, by means of ridges or chains of swelling hills and corresponding vales, with level downs; the soil a loose, greyish brown loamy mould on the hills, but darker and more cohesive and humid in the vales and downs; this superficial, vegetative earth, covers a deep stratum of very tenaceous yellowish clay: the downs afford grass and various herbage; the vales and hills forest trees and shrubs of various tribes, i. e."