The laserdisc colors look the best by far. I definitely recommend using that as the primary reference, since not only is it the most pleasing to the eye, it is much closer in 'feel' to what movies back then looked like, generally speaking. If it is the closest to the appearance of film prints, as Jonno says, then that makes a great deal of sense for why it feels right.

You shouldn't necessarily adhere to it slavishly in every detail, of course; after all, old home video masters are not known for perfect accuracy in color or contrast. But get it looking pretty close to that and I for one will be very, very pleased.