^I don't know why you'd be choosing to perpetuate that myth about the ratings, when it has been talked to death so many times here it isn't remotely funny.
The blood color was always a plot point (excised in the theatrical release), pointing up the Khitomer would-be assassin's true nature.
It was never about ratings. The ILM guys even said as much, that they'd have needed Peckinpah-volume gore to get an R-rating, regardless of color.
This rating thing seems to always go back to a Rick Berman COMMUNICATOR quote, and he is hardly the source of authenticity for a film he was only peripherally involved with.
In recent years, there has been a lot of retcon / print the legend revisionism about this (I think Meyer is guilty of it too), but the pink blood to avoid R rating biz is just horseshit, plain and simple.
Why anybody thinks the MPAA would rate something a certain way BASED ON A SHOT DESCRIPTION IN A SCRIPT -- when they rate movies, not screenplays -- also begs explanation.