Well, brown, I think...! Kid...! I can say it for sure. Maybe, you can prove it by zooming in my picture. Not really brown, actually, but closed to (rather) brown. Because, if I say them black, they are not black.
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They say black is the color of secrets, deepness, intense and supremacy, companionship like shadow above all no matter what they do not change rather I would say firm in nature as nothing can override them.