So far, I am really pleased hoe the suit looks, even with the dark color of the film, it still looks fairly bright and the red is noticable and doesn't also look like it could possibly be dark brown or purple either.
The leaked photos of Cavill in his suit for the Smallville battle in MOS made me excited and at first I thought to myself I'm flattered they are not going to go the Superman Returns way. Yet Snyder made the film so dark, and it a number of scenes, the red is very mutated.
which was disapointing.
Before that however, I remember watching the leaked Comic Con footage, and being pleased by how bright the red on Superman's costume looked, but then noticed by the second official trailer, Synder darkened the final cut.
In that scene where Superman explains the phantom drive to Swanwick, thr color is so dry and it's as if they are trying to hide Superman's colors because they think it's cheesy. The red looks completely dried out, the way tomatoes look when they dry out, that same color.
I assume though that they have finished editing the film, so that is the final cut of what the film looks like that we saw in the trailer.
At least MOS's condition wasn't as bad as tv's The Flash is with the Flash suit, at night time, you can't even see the red because it looks black!