This might be a factor in why some think the movie is drab looking?
http://www.indiewire.com/2018/05/solo-star-a-wars-story-theatre-projection-problems-bradford-young-1201969989/
I saw the movie in a pretty new theatre and with 3D especially the opening scenes were really dark, and hard to see. I think it’s just the movie. I’ve seen a ton of movies there and never had this problem.