Ok this is going way back but it has to do with the colors of the DVD's & the Blu's
I remember back in 1966-67 one review actually did mentioned the golden Mediterranean light. Back then I read reviews from the NY Times, the NY Daily News, The Long Island Star Journal, Time, Newsweek, and a couple of other Film review publications so it had to be one of them. I've been uploading images from a past European trip and that discussion we had and that review again came back to me when I was uploading the images.
In Parma


Roma


Dalmatia

even Cortina in the Dolomites

There is a more golden hue to the blue sky in the Mediterranean.