colorful vs of color

colorful

adj
  • Possessing prominent and varied colors. 

  • Profane, obscene, offensive (usually in the phrase colourful language). 

  • Interesting, multifaceted, energetic, distinctive. 

of color

adj
  • Nonwhite; of a race other than white, for example black. 

  • Belonging to a category of people with mixed black and white ancestry in the Americas in the 18th and early 19th centuries. 

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