blue-gray vs hoar

blue-gray

adj

  • Of a bluish grey color. 

hoar

adj

  • Of a white or greyish-white colour. 

  • Hoarily bearded. 

noun

  • A white or greyish-white colour. 

  • Hoariness; antiquity. 

How often have the words blue-gray and hoar occurred in a corpus of books? (source: Google Ngram Viewer )