I don't think we can base the color of the jacket off a 1980 Kenner action figure (or modern Hasbro ones for that matter). :)
However, the jacket was most definitely brown for filming. However (again), I always think of the jacket as blue and have always thought of it as blue throughout the course of all iterations of the film. Whether it appears that way due to lighting, film stock, color correction or whatever, the jacket looks blue on screen. Of course, some shots make it look brown as it should. Ah who knows. We'll see what Ady's corrections make it look like in the end...