I've been rewatching the show as well recently, and Joker's outfit really does seem to go through serious color change from season one to season three. I don;t know if its new calibrations on technicolor or whatever they used back then, or new color grading now, or they actually made a more "hot pink" vibrant suit later in the show but it does seem to go from a darker, more purplish "pink" in the first season -- where the lighting was much more shadowy as well -- to a more bright "hot pink" by season 3.
This figure looks much closer to season 3.
I'm wondering, does anyone plan to dip the entire outfit into a purple dye bath to make it closer to season 1?