I remember Nova Cygni 1978... 1st magnitude. And it looked purple...
You must mean Nova Cygni 1975. Members of my club were among the first to see it. It was quite an evening. First time my Mom let me stay out all night.
http://en.wikipedia.org/wiki/Nova_Cygni_1975
I have yet to see this newest nova as we have had feet of rain (not inches) this last week. MAY have a chance tonight.