I agree with each of us having unique perspectives, but the use of color is a poor example because it is so quantifiable. The physical world is what it is, and while we each make our own value jugdements regarding it, one ignores the objectivity of reality at one's own risk. Does it really matter what you think about the speeding car that's rapidly approaching you? Just get out of the way!I think the whole point is that as biological entities who grew up in different environments, we all look at the world from slightly different perspectives, for whatever reasons. The use of color is just an easy and convenient example to illustrate the principle. It's not the exactness of the shade that matters as much as that it encapsulates something that to an extent, is true on a larger level as well.