I submit that all gray can be divided into shades of white and shades of black. For example, using the RGB system there are 16777216 colours. Exactly 8388608 of them are more bright than they are dark, and exactly 8388608 of them are more dark than they are bright. There is no middle ground colour.I suppose that is true, you have to remember all of the gray areas in the world.
I know the real world doesn't operate on that system, but I still think all acts can, on some fundamental level, be divided into good or bad. Some are so close together that figuring it out is an effort in futility, where killing 1301 old ladies for a hundred years of world peace is evil but killing 1300 and two dogs is good, but they can still be separated. Of course, I can't possibly claim to know what the true morality actually is, I just try to figure out what I think it would be. In the end I don't end up acting any different than a person with subjective morality, but I do it for different reasons. They're trying to draw a picture they like while I'm trying to put a jigsaw puzzle together that includes nigh-infinity pieces which are almost all slightly defective versions of the real parts of the picture. XD
And no, I'm not actually saying that killing 1300 old ladies and two dogs for a hundred years of world peace is good.