Shayari Bazar

There are 3 black hats and 2 white hats in a box. Three men A, B and C each reach into the box and place one of the hats on his own head. They cannot see what color hat they have chosen. The men are situated in a way that A can see the hats on B & C’s heads, B can only see the hat on C’s head and C cannot see any hats. When A is asked if he knows the color of the hat he is wearing, he says no. When B is asked if he knows the color of the hat he is wearing he says no. When C is asked if he knows the color of the hat he is wearing he says yes and he is correct. What is the color of the hat C is wearing and how did he figure out the color of his hat? You can assume that all three men are perfect logicians.