[mannschott]

Back in the day™ Think’s Pascal used bold, italics and underlining to do syntax highlighting because the Mac’s screen was black-and-white. It would be a compromise: you can’t encode as much information into the text’s appearance without access to color, but it could be sufficient depending on your requirements.

[int_19h]

Even further back in the day, the Algol-60 reference language used bold and/or underlining for keywords - handy when all you have is a typewriter:

http://www.softwarepreservation.org/projects/ALGOL/report/Al...

http://www.algol60.org/reports/algol60_rr.pdf

(Although technically this was actually syntax, not just syntax highlighting, since that's how the reference language distinguished between keywords and identically spelled identifiers.)

[jagger27]

I’m thinking of old Visual Studio syntax highlighting where it primarily uses green and blue. Maybe pick one of those like E-ink panels can already do.