off-color vs vulgar

off-color

adj
  • Dirty, vulgar or obscene, especially in a way that is unpleasant. 

  • Feeling mildly unwell. 

  • Different than usual. 

  • Of the wrong color. 

vulgar

adj
  • Debased, uncouth, distasteful, obscene. 

  • Being a vulgar fraction. 

  • Common, usual; of the typical kind. 

  • Having to do with ordinary, common people. 

noun
  • The common people. 

  • The vernacular tongue or common language of a country. 

  • A common, ordinary person. 

How often have the words off-color and vulgar occurred in a corpus of books? (source: Google Ngram Viewer )