Why Hyperlinks Are Blue: A 1990s UI Decision Turned Internet Law
Elise Blanchard’s historical research last year traced blue hyperlinks back to 1993, when they replaced black ones. The convention has stuck so firmly that the standard advice remains: keep links blue, because decades of muscle memory now equate blue text with clickability.
A follow-up investigation by Blanchard pinpoints the origin of that color choice. The credit goes to Professor Ben Shneiderman, though the story does not begin with the web itself.
In the early 1990s, operating systems were already using blue for interactive components and highlighted text. By the time Mosaic’s Marc Andreessen and Eric Bina chose blue for hyperlinks—and Cello did the same—blue had been emerging as the industry standard for hypertext interaction for roughly eight years. That earlier research had been presented at conferences, printed in industry magazines, and debated across multiple forums. Diverse research teams kept arriving at the same conclusion: color mattered for usability. Whether or not Andreessen and Bina were directly inspired, the researchers around them were.
The explanation comes down to research conducted at the University of Maryland, whose findings directly influenced the blue hyperlink decision. The web inherited a color choice that was less about aesthetics and more about established interaction design principles from the pre-web era.
