Looks like Lucasarts has some serious issues getting lightsaber coloring correct in all aspects of entertainment.
Quote taken from a review for The Force Unleashed
"One would think LucasArts would have paid closer attention to quality control on a game in development for approximately four years. Forgivable are some sparse jitters and lag considering the sheer amount of destruction going on at any given time at the hands of the Force and DMM and how great the game looks – and sounds -- in high definition. Unforgivable is the Secret Apprentice wielding a blue lightsaber during multiple cut-scenes yet using a red one in the gameplay segments surrounding those scenes. This error sticks out like a sore thumb on more than one occasion and detracts from otherwise strong CGI animation."