chroma vs hue

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 

hue

noun
  • A color, or shade of color; tint; dye. 

  • A character; aspect. 

  • The characteristic related to the light frequency that appears in the color, for instance red, yellow, green, cyan, blue or magenta. 

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