bluish vs purpure

bluish

adj
  • Having a tint or hue similar to the colour blue. 

  • Somewhat depressed; sad. 

purpure

adj
  • In blazon, of the colour purple. 

noun
  • A purple colour on a coat of arms, represented in engraving by diagonal parallel lines 45 degrees clockwise. 

  • purpure 

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