"You ain't been blue; no, no, no.
 You ain't been blue,
 Till you've had that mood indigo."
 — Song lyrics, authorship disputed

 

Indigo (web color) (#4B0082)

"Pigment indigo (web color indigo) represents
 the way the color indigo was always reproduced
 in pigments, paints, or colored pencils in the 1950s."

Related mythology:

Indigo Children and the classic
1964 film Children of the Damned

Image-- Children of the Damned take sanctuary in St. Dunstan's Church.

Related non-mythology:

Colored pencils

Image-- Diamond-shaped face of Durer's 'Melencolia I' solid, with four colored pencils from Diane Robertson Design