blue-red vs purpurate

blue-red

adj
  • Of a colour between blue and red; purple or crimson. 

  • Consisting of the colours blue and red individually. 

noun
  • A colour between blue and red; purple or crimson. 

purpurate

adj
  • Of a purple colour. 

noun
  • A salt of purpuric acid. 

How often have the words blue-red and purpurate occurred in a corpus of books? (source: Google Ngram Viewer )