[Linbro]

Originally Posted by Antropophagus

Waste of money if you ask me, sure, the movie is great but the transfers of the BDs are not good for the price of the set.

Kentai's Films: There's No More Room In Hell: DAWN OF THE DEAD's New HD Master Explored

Apparently they were encoded in the wrong colour space - or something.
If you can access the right settings in your BD player, you can fix the problem. For that price though, it should be plug-and-play.