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The concept that the brain fills in the blanks for us (with colors) is starting to really make sense to me.  This concept must save the brain a lot of time, as it doesn't have to interpret every pixel, like a camera.  Also, it probably saves our brains time in that it answers questions to prevent confusion.  For instance, if see something from far away and it appears to be covered in dots, then you just go with 'its covered in dots" unless you personally choose to question what you are really seeing.  I can't imagine how much time it would take if I needed to think about each object I saw, and question the color or pattern or texture.  To me, it seems that our brains are set up to make these assumptions and save us time from thinking about what the color or texture is to everyone else.  I know I could drive myself crazy if I looked at a shirt that was greenish blue, and debated which color it was with myself.  It always seems to me with those kinds of discrepancies that i'm not fighting with myself over the color, but I may disagree with other people as to what color the shirt really is (green or blue), because my brain made a quick one time decision about the color.