Frank J. Wilstach, comp. A Dictionary of Similes. 1916.

Brown

Brown as forest flood.
—Cuchulain

Browne as the fylberte droppyng from the shelle.
—Thomas Chatterton

Browne as the nappy ale at Hock tyde game.
—Thomas Chatterton

Broun as is a berye.
—Geoffrey Chaucer

Brown,
As is the ribbed sea-sand.
—Samuel Taylor Coleridge

Brown as a pineapple.
—Alphonse Daudet

Brown as the hearth of a kitchen fire.
—John Gay

Brown as a bun.
—Thomas Hood

Locks … as brown as mavis in May.
—Richard Le Gallienne

Brown as nut.
—Henry W. Longfellow

Brown as vesper gloamings.
—Walter Malone

Brown as buckeyes.
—Edwin D. Schoonmaker

Brown in hue as hazel nuts.
—William Shakespeare

As twilight brown.
—Algernon Charles Swinburne