Given the author's "conclusions" about Windows's influence here, it's probably worth mentioning that Windows 3.x (including both 3.0 and 3.1) used green for hyperlinks in its help system by default (which was hypertext but not HTML): https://i.imgur.com/ZjX5xIW.png

Green hyperlinks stuck around in the Windows 95 help system, and were eventually replaced when Windows 98 switched to Microsoft's new HTML Help system which defaulted to blue hyperlinks (inherited from Internet Explorer).