The colour
negative spectrum is Blue to yellow, red to cyan & magenta to green. We know the human eye is prone to seeing Green stronger than red, so based on that knowledge, It's our eyes neutralizing the natural magenta colour of M42 because Green cancels Pink. The colour is there & this is why colour film works & why we can't see the pink other than a green cast.
You have all taken a photo with flouro light or mercury vapor light in the room. When you got your photo back it has GREEN cast yet when you took the photo the room looked white. This is the same effect.
Fact.
