Why are most web hyperlinks blue?

"Red and green are the colors most affected by color-vision deficiency. Almost no one has a blue deficiency. That means almost everyone can distinguish blue as a color different from others. It was pure good luck that the default color of hyperlinks is blue with underlining."

-- from KISSmetrics

"Colour are light's suffering and joy." -- Johann Wolfgang von Goethe

A good article on inclusive design with color: https://medium.com/intrepid-s-insights/designing-for-and-with-color-blindness-48392aab3d87