Black is a color right?
Tell him he's looking at a color right now
I don't think that would work..
For one thing, black being a color at all is debatable, as you can tell by the last two pages.
But also, do blind people really see black? Or do they just see.. well, nothing?
As color is incomprehensible to the blind, maybe what the blind see, or well, don't see, is incomprehensible to us. Maybe the blind just don't register any sort of image in their heads at all, not even a black void