Which religious product design innovation was specifically created in the 1950s to help make scripture more accessible and is now recognized by its distinct red lettering?

Religious products and artifacts have evolved over centuries, incorporating design elements that communicate deep spiritual meaning while maintaining functionality. From prayer beads to temple architecture, product design in religious contexts balances tradition with accessibility. This poll explores how famous religious symbols have been incorporated into product design and branding that transcends mere commercialism to create objects of spiritual significance.

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The Red-Letter Bible (with Jesus's words printed in red)
The Prayer Wheel App (digital version of Tibetan prayer wheels)
The Illuminated Quran (with color-coded recitation guides)
The Meditation Timer (with traditional bell sounds)