Which inventor conducted extensive research to determine that yellow was the optimal color for their product because it was the first color the human eye notices in peripheral vision?

When groundbreaking inventions meet thoughtful design, even the smallest details can make history. One famous inventor paid extraordinary attention to the color of their revolutionary product, conducting extensive research to determine the most effective hue for its purpose. This decision would influence product design philosophy for decades to come. Test your knowledge about this fascinating intersection of psychology, design, and invention!

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Chester Carlson (Xerox photocopier)
John Loud (ballpoint pen)
Percy Spencer (microwave oven)
Arthur Fry (Post-it Notes)