henna vs red-brown

henna

adj
  • Of a rich reddish-brown colour. 

noun
  • A reddish plant substance, prepared from the dried leaves of this plant, used for temporary tattoos and hair coloring. Hair colorings range from bright red to earth brown to near black. 

  • A shrub, Lawsonia inermis, having fragrant reddish flowers 

  • A rich reddish-brown colour. 

verb
  • To dye or tattoo with henna. 

red-brown

adj
  • Having a colour between red and brown. 

  • Having the qualities of fascism and communism. 

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