Hacker News Reader

It's named after Oxford Blue, which is in fact, blue: https://en.wikipedia.org/wiki/Oxford_Blue_(colour)

The Cambridge Rugby blue which pre-dates the Boating blue is also more properly blue: https://en.wikipedia.org/wiki/Cambridge_University_R.U.F.C.

that's green! whoever invented the name of the colour had a different vision

That's beige, but green.