The Collaborative International Dictionary of English v.0.48:

'Ecru \['E]`cru"\, a. [F., fr. L. crudus raw.]
   Having the color or appearance of unbleached stuff, as silk,
   linen, or the like.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ecru
    n 1: a very light brown [syn: beige, ecru]

Moby Thesaurus II by Grady Ward, 1.0:

84 Moby Thesaurus words for "ecru":
   aureate, auric, beige, brown, brownish, brownish-yellow, brunet,
   buff, buff-yellow, canary, canary-yellow, chocolate, cinnamon,
   citron, citron-yellow, cocoa, cocoa-brown, coffee, coffee-brown,
   cream, creamy, drab, dun, dun-brown, dun-drab, fallow, fawn,
   fawn-colored, flaxen, fuscous, gilded, gilt, gold, gold-colored,
   golden, grege, hazel, khaki, lemon, lemon-yellow, lurid, luteolous,
   lutescent, nut-brown, ocherish, ocherous, ochery, ochreous,
   ochroid, ochrous, ochry, olive-brown, olive-drab, or, primrose,
   primrose-colored, primrose-yellow, saffron, saffron-colored,
   saffron-yellow, sallow, sand-colored, sandy, seal, seal-brown,
   sepia, snuff-colored, sorrel, straw, straw-colored, tan, taupe,
   tawny, toast, toast-brown, umber, umber-colored, walnut,
   walnut-brown, xanthic, xanthous, yellow, yellowish,
   yellowish-brown



U.S. Gazetteer Places (2000):

Ecru, MS -- U.S. town in Mississippi
   Population (2000):    947
   Housing Units (2000): 411
   Land area (2000):     4.094841 sq. miles (10.605590 sq. km)
   Water area (2000):    0.006807 sq. miles (0.017631 sq. km)
   Total area (2000):    4.101648 sq. miles (10.623221 sq. km)
   FIPS code:            21340
   Located within:       Mississippi (MS), FIPS 28
   Location:             34.355505 N, 89.027633 W
   ZIP Codes (1990):     38841
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Ecru, MS
    Ecru