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Squares A and B are not the same there. I masked out everything but those squares are they are different. Maybe it's supposed to refer to the letters?
Color is fascinating. I've always wondered if my green was someone else's yellow. Aside from color blindness, I would guess that some translation of the spectrum occurs between people. Also, I imagine that our reactions to colors are partially hardwired. The reason that blue is considered cool and calming probably has to do with the fact that water and clear skies are bluish.
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I learned on Radio Lab recently that there is no reference to the color blue in Homer, and that it doesn't exist in pretty much any other ancient work either. In fact, Homer continually refers to the sea as being "wine colored", and seems to ignore the color of the sky. They speculate that the reason for this is that there were no artificial blue pigments, and very few things in nature (none in Greece) are blue. Apparently, until one can artificially manufacture a color, it doesn't hold a lot of significance to humans. Very interesting thought.
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Universe only exists in our minds which is all a quantum mechanical and hence purely mathematical concept which can be described in a computer in a universe larger than our own. Colors exist no more than the world itself, the certainty about either, we can never be truly sure of.
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