I really love how clueless people are and how far they go to show how dumb they are.

Something today would need to be shooped to match the coloring of a live action, shot on location 80s movie.
This also means the actual color of the trenchcoat is also different from the movie set photos.

To argue that the trenchcoat should exactly the color of whatever scene you're cherrypicking is like arguing that a Venom toy should be blue, because that's the prominent color used in the comics.