That's an interesting observation Baronlando, it seems that the THX mastering maybe had a strange effect on the masters, several laser blasts from the TIE's in Empire has very soft almost yellow colors instead of green when chasing the Falcon and is clear blue in the PAL version and the lights on the panel behind C-3PO's oil bath in Star Wars is blue instead of green in some shots or vice versa. A little nitpicking perhaps, but it shows that these video masters also has some color glitches, even if they're overall very good in colors in comparison to other transfers.