olive green vs ultramarine

olive green

adj
  • Having this hue. 

noun
  • A green-yellow hue that is brighter and greener than olive. 

ultramarine

adj
  • Of a brilliant dark blue or slightly purplish colour like that of the pigment (noun sense 1). 

noun
  • In full ultramarine blue: a brilliant blue pigment that was traditionally made from ground-up lapis lazuli, and now usually either extracted from mineral deposits or made synthetically. 

  • A brilliant dark blue or slightly purplish colour like that of the pigment. 

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