I actually would like to know myself what color the are? Or did they change throughout the movies?
nce the pics Ryan posted clearly show different colors I'd say they probably did change them. The make-up changed to some degree in each movie, the gloves changed style in each movie, and the sweater went from solid red sleeves in the first movie to striped sleeves. Detailed continuity in the character's appearance wasn't exactly a priority so it's understandable they would change the color of the pants.
I am sorry but I just had too!