I think we should agree the ultimate version is TWP:
So the correct colour is more of a green!
I remember talking about this topic in the blog.
And as it seems like they had technical limitations in v1 (C64) so they used pink.
But they actually wanted them to look creepy so in v2 (EGA) they have used cyan (which was also a technical limitation). The mentioned NES version was then based on this I guess.
Now with TWP, having unrestricted access to all 256 existing colours on this world, they could finally choose their desired one.
