Which religious publishing company pioneered the 'Rainbow Study System' - a revolutionary color-coded packaging design that helped readers navigate complex religious texts more easily?

Religious products often feature intricate packaging design elements that carry deep symbolic meaning. From prayer books to ritual objects, the visual design of religious merchandise combines aesthetics with spiritual significance. This trivia tests your knowledge about a notable packaging design innovation that revolutionized accessibility to sacred texts across different faith traditions.

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Zondervan (HarperCollins Christian Publishing)
Shambhala Publications
Oxford University Press Religious Division
ISKCON Publishing House