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It was the traditional White on Black.
Green Screens were an "oooh wow!!" device at that point. There were three student-accessible DECwriters (dot matrix paper terminals) in the Computer Center, and thirty or so in a room in the Math Building. Later in my college career the collection of DECwriters expanded a wee bit, and another 10 were added in a former storage room in the computer center. The ones actually in the CC were very big deal, since they were directly connected to the mainframe, while all the other machines on campus had acoustic coupler modems. 300 baud, baby! There were also occasional Beehive and Hazleton (IIRC) CRTs. One of the Beehives (in the old storage room) was a little finicky, and had some kind of a short. The text on the screen would get strange and wobbly, and characters you KNEW you hadn't typed would start appearing. The "fix" was to pick it up about six inches off the desk and drop it. Whatever transistor stopped transisting or whatever would get nudged back into place and you could happily go back to typing.
One of the staff in the computer center (I think I may have spoken of how we had tacit approval to break into his office at night) had a CRT terminal with a floating keyboard. We were in awe of his ability to sit with his feet on his desk and his keyboard on his lap. We emulated this behavior during our nighttime sojourns.
There was even one very, very cool vector graphics terminal, which was made extra special by having a 1200 baud modem. We had never seen anything quite so fast. It was reserved for the use of advanced students in the graphics classes. It also had some quirks, which were easily repaired by slamming it underneath the attached keyboard, right around the "H". I majored in Geography and Planning, but minored in Computer Repair.
Amber screens came much later.
DOS-based IBM PCs came to the campus in either my junior or senior year.
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