The Collaborative International Dictionary of English v.0.48:
Silver-gray \Sil"ver-gray`\, a. Having a gray color with a silvery luster; as, silver-gray hair. [1913 Webster]WordNet (r) 3.0 (2006):
silver-gray adj 1: of grey resembling silver [syn: silver-grey, silver- gray, silvery-grey, silvery-gray]