Here are a few more comparisons between the automated color correction, and the bluray matched to the Tech IB print:
Team Negative1 LPP scan:
Tech IB:
Team Negative1 LPP automated color correction:
Team Negative1 LPP scan:
Tech IB:
Team Negative1 LPP automated color correction:
Team Negative1 LPP scan:
Tech IB:
Team Negative1 LPP automated color correction:
Team Negative1 LPP scan:
Tech IB:
Team Negative1 LPP automated color correction:
Considering how close these predictions are to the Tech IB colors, while not having been matched to the Tech IB, my conclusion is that the original LPP colors were very close to the Tech IB colors. Consequently, I can only conclude that the Tech IB print is very representative of what people saw in the theatre in 1977.
So, unless the agreement is a huge coincidence, which I think is higly unlikely, I think this is the first solid evidence of what the actual colors were of Star Wars back in 1977, when it was first released.