Talk:Dust/@comment-28189972-20160522180718/@comment-28189972-20160522182040

Because the product of the dust itself is black. It leaves behind purple smoke, and has a purple outline, but the main part is black when it's activated.

It's just like how fire dust is red, but it comes out as orange. Because that's what fire ususally looks like. Or how ice is likely dark blue, but comes out looking like actual ice, ie light blue/clear.