off-color vs uncouth

off-color

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

  • Feeling mildly unwell. 

  • Different than usual. 

  • Of the wrong color. 

uncouth

adj
  • Unrefined, crude. 

  • Clumsy, awkward. 

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