You know Jeff I understand the issues with photography and where some come to the conclusion that 5-D can present as blue... Like your pics here from shutterstock... (I just don't understand why they are darkened so much, it must be a shutterstock thing)
The Ford film shot shows her in Dark Grey the other two show her as a patchwork of dark greys and dark purple blues... Evidently both from the roughly same time period... (where they are building the wooden casemate to extend her hull up above the waterline to pump her out)
It's pictures like these that cause the confusion and arguments and no one has a good explanation for the change in colors...
All of the screen shots of California from the Ford movies present as dark grey.... and then we have these shots that seem to say the opposite......
I don't know what to tell ya... they were in the middle of the process of repainting the battle line, some were painted some were not..... I tend to believe the Ford footage more than the others cause it just appears more natural and we know what the equipment was, these other shots people keep throwing up in the argument we do not know what the equipment was...
So although I do not completely disregard them I do give them less weight than the Ford movie captures... they are also why I will always state that what I'm saying is my opinions only and that others are free to interpret the evidence any way they wish to...
Either way, no one can claim with absolute certainty that the ships were one way or the other, there are way too many unanswered questions......
Most of the color shots I see of 5-D appears black to mottled faded dark grey..... and as you point out there are a few that show as purple blue....
And I doubt that we will ever find out the absolute reason why....
EG
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Ps...
All I did was download them from source and lighten them 10% there is no doubt that on some occasions and under certain conditions that old worn 5-D could appear very bluish....
And, I am of the opinion that color shift over time cannot account for this great a color change, it has to be something else.... We know the ship was in 5-D.....