Don't know what colors they see or don't see, we have hunted them wearing orange, that bright safety lime yellow, jeans and tee shirts, and full blown camo and had them running over us, or away as fast as they could get there.
I know for a fact they can pick you off at over a hundred yards, been there had it happen too many times. We ridged up the backside of a flood levee one morning to find close to 50 of them standing around 200yds away. Nothing but the tops of our knoggins sticking up and the wind in our face. They were feeding across towards us when the matriarch sow stopped dead in her tracks looking right at us and turned tail and left with the others in tow. They didn't all make it back to the woods, but it would have been a whole lot better had they come in closer.
I have had them walk right up to me as if I wasn't even there, and I have had the come in and stop dead in their tracks like a few weekend back, and hit reverse as fast as they could.
Now hearing and smell, I think they are a step up on a white tail in those areas, not to mention being smart. They learn REAL quick sometimes only taking once to figure out something ain't right.