Google, far more functional and established than tiny Odeo, was led mostly by former Stanford students making data-based decisions. It was the culture that drove homepage leader Marissa Mayer, who later became CEO of Yahoo!, to famously test 41 shades of blue to figure out what color would give the company’s hyperlinks the highest click-through rate. A slightly purpler blue shade won out over slightly greener shades, helping boost revenue by $200 million a year. Seemingly insignificant changes could make a huge difference when applied to millions or billions of people.
