Please, no. If we must have any color besides blue and red, make it green - but even that I'm not a fan of. I'd much prefer all blue until Luke in ROTJ, symbolizing that Luke has found the "middle way" (to bring a bit of a Buddhist mentality to this) between "pure" light side, which is too restrictive, and "pure" dark side, which is too corrupt, thus heralding a new age of Jedi not bound to highly restrictive dogma the way the Jedi of the Old Republic had been.

But then again, I wouldn't mind certain Jedi masters having green (Qui-Gon, Yoda [if he must be seen with a lightsaber, which I'm also very much against], Windu, etc.), just as long as there's no fucking purple, yellow, orange, pink, or any of that shit. I could deal with white for trainees, though.