Rainbow Reverie: Indigo

Indigo isn't a real color. Check back for Violet soon. Isaac Newton just wanted there to be 7 colors to fit with numerology. 7 days of the week, 7 notes in a musical scale, etc. Indigo isn't real.

'It is customary to list indigo as a color lying between blue and violet, but it has never seemed to me that indigo is worth the dignity of being considered a separate color. To my eyes it seems merely deep blue.' -- Isaac Asimov