indigo vs murrey

indigo

adj
  • having a deep purplish-blue colour 

noun
  • A purplish-blue colour 

  • An indigo-colored dye obtained from certain plants (the indigo plant or woad), or a similar synthetic dye. 

  • An indigo plant, such as from species in genera Indigofera, Amorpha (false indigo), Baptisia (wild indigo), and Psorothamnus and Dalea (indigo bush). 

murrey

adj
  • Of a mulberry colour. 

noun
  • A tincture, the colour of mulberries, between gules (red) and purpure (purple). 

  • The mulberry fruit. 

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