What is the origin of green in hacker culture?

Question

Whenever the theme "hacking" is portrayed by the media put anti-social faces in a terminal Black in green letters. I wanted to know where this green of letters always comes from. It’s some symbolic?

Answer 1

In the 1980s, green phosphorus monitors were used, and often featured 'ghosts' on the screen. In addition to inspiring this hacking look, it also inspired that look of Matrix.

see more in: https://en.wikipedia.org/wiki/Monochrome_monitor