section_path: Unusual colors
section_name: Unusual colors
paragraph_text: Unusual colors
  
  Some colors are objectively unusual or special. For example "orpiment" was a pigment used by painters in the 16th century, but is now considered dangerous due to arsenic. "Sonoluminescence" is a blue-purple created by the energy of sound waves from tiny bubbles in extreme experimental conditions, and was discovered in 1934.