The firefly or lightning bug is an insect best known for the green light it emits. Its green glow was a mystery for years, which caused many to believe it was a mythical sort of creature. The green light is now known to occur through a special gene, which codes for a protein called luciferin (from the Latin lucifer, "light-bringer") (CreationWiki, 2011)

The "New Age Prophetess", Alice Bailey, in her system called the Seven Rays which classifies humans into seven different metaphysical psychological types, the "fifth ray" of "Concrete Science" is represented by the colour orange. People who have this metaphysical psychological type are said to be "on the Orange Ray" (Wikipedia, 2017)