Alien: Covenant Engineer extras

Yes, the long vein is black, maybe because its connected with the pressure suit (my assumption).

But if I'm not mistaken, some of these other veins look dark red or blue (I don't have the best eyesight).

The scene with the last Engineer was shot in dark room.

I think it has something to do with colour grading that was done in post.

The same thing with the eyes. In the film, they look very black, but they actually have lighter sclera, not 100% black.

Colour graded (screenshot from the film)

Unedited version

Or they just have black veins.

I believe the Thanos skin tone differences can be explained by the dimmer switch he installed next to his galactic throne and the LED lights he installed in the vault where he keeps his glove.

And the Engineers on LV-223 were called "sentient" beings in the Weyland-Yutani Report. Just saying.

I think there is a interesting Story to be Told regarding the LV-223 Engineers and Planet 4 ones for sure.

I think the comment RS made regarding how the Planet 4 Engineers are the Original Engineers, the comments regarding the Hall of Heads being Superior Beings, Apostles and Wise Men and indeed Ridley Scotts comments regarding the Engineers being Genetic Gardeners and how the LV-223 Engineers are FALLEN.

Certainly means there is some interesting not explored BACK-STORY at play.

Is what that Story is a Mirror of what we see with Davids Arc and Story?

One of the female Engineers

Source:

http://www.suzibattersby.com/work/item/alien_covenant