The story
Coined in the 1970s by Nancy Ann Tappe, a synaesthete who claimed to perceive most children under the age of ten with an indigo aura.
Etymology from Wiktionary, CC BY-SA 4.0.
Indigo child
Today it means: A child believed to be the next stage of human evolution; believed to have paranormal abilities like telepathy, or to be more empathic, independent, and creative than their peers. Full definition →