WordNet (r) 3.0 (2006):

taupe
    adj 1: of something having a dusky brownish grey color [syn:
           fuscous, taupe]
    n 1: a greyish brown

Moby Thesaurus II by Grady Ward, 1.0:

99 Moby Thesaurus words for "taupe":
   Quaker-colored, acier, ashen, ashy, beige, brown, brownish,
   brownish-yellow, brunet, canescent, chocolate, cinereous, cinerous,
   cinnamon, cocoa, cocoa-brown, coffee, coffee-brown, dapple,
   dapple-gray, dappled, dappled-gray, dingy, dismal, dove-colored,
   dove-gray, drab, dreary, dull, dun, dun-brown, dun-drab, dusty,
   ecru, fawn, fawn-colored, fuscous, glaucescent, glaucous, gray,
   gray-black, gray-brown, gray-colored, gray-drab, gray-green,
   gray-spotted, gray-toned, gray-white, grayed, grayish, grege,
   griseous, grizzle, grizzled, grizzly, hazel, iron-gray, khaki,
   lead-gray, leaden, livid, lurid, mouse-colored, mouse-gray, mousy,
   nut-brown, olive-brown, olive-drab, pearl, pearl-gray, pearly, sad,
   seal, seal-brown, sepia, silver, silver-gray, silvered, silvery,
   slate-colored, slaty, smoke-gray, smoky, snuff-colored, sober,
   somber, sorrel, steel-gray, steely, stone-colored, tan, tawny,
   toast, toast-brown, umber, umber-colored, walnut, walnut-brown,
   yellowish-brown