50 shades of the colors of the wind by Egantx7

Question 8

One 1930 song (which is just as often played as an instrumental) with this shade in its title opens with the lyrics:

You ain't never been blue, no, no, no

You ain't never been blue

This shade also appears in the name of a band that includes members Amy Ray and Emily Sailers

(Mood) Indigo (Girls)