dye vs skin color

dye

noun
  • Any hue, color, or blee. 

  • A colourant, especially one that has an affinity to the substrate to which it is applied. 

verb
  • To colour with dye, or as if with dye. 

skin color

noun
  • The color of human skin. 

  • One's ethnicity. 

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