If people's faces are bright orange, and white walls are leaning towards blue then you know the process has gone off the rails. As for setting the greyscales/gamma then that is totally subjective - In theory you want all levels of grey clearly visible, but a creative decision might be to darken up the shadow areas for 'mood' and so lose detail in the shadows that was there on the original film.
Also, a CRT cannot display the same colour space as film, so they are radically different.