I think the stark colors made it easier to follow what you were looking at. The Saradukar wore white in the movie so it was a lot easier to follow that they wer

I think the stark colors made it easier to follow what you were looking at. The Saradukar wore white in the movie so it was a lot easier to follow that they were imperial forces and not Harkonnen. Anything they can do to make the plot more transparent, the better.