I also have this problem, I have swapped the swann cameras for storage options cameras both bought from maplins and this has happened also. The cameras work fine with the storage options dvr but when I connect them to the swann system the colour is as you have described. I have also tried powering the cameras with the storage options power supply but still have the same problem. My conclusion is that this must be an issue with the swann system and compatibility. I wanted to use the swann system as this as hdmi output but the storage options does not. If anyone has any solution your help would be greatly appreciated.