aurora-colored vs iridescent

aurora-colored

adj
  • Having many colors, reminiscent of those in an aurora. 

iridescent

adj
  • Producing a display of lustrous, rainbow-like colors; prismatic. 

  • Brilliant, lustrous, or colorful. 

How often have the words aurora-colored and iridescent occurred in a corpus of books? (source: Google Ngram Viewer )