Blind Bargain

The caption said,

I wanted to see if I could create an entirely new product within a strict timeframe. Designed, modelled, lit, textured and rendered over 10 days. Took about 40 hours from initial idea to final image.

Note how the moves of the pieces are incorporated into their design.

Chess Set for the Blind © Flickr user dncnmckn under Creative Commons.

The design of the King and Queen (set up correctly on her color) are perhaps too similar. A smaller center for the Queen with longer points would fix that. Most sets for the blind that I've seen are pegged.

How does a blind person detect the color of a piece, not just on this set, but on any set?