chroma vs complexion

chroma

noun
  • The aspect of a colour's hue that depends on the amount of white or black in it; saturation 

  • A note in a chromatic scale 

  • The colorfulness relative to the brightness of a similarly illuminated area 

complexion

noun
  • The quality, colour, or appearance of the skin on the face. 

  • Outlook, attitude, or point of view. 

  • An arrangement. 

  • The outward appearance of something. 

verb
  • To give a colour to. 

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