Last week I was in a Sign Language class in Argentina when we were learning different colors. One of the colors that came up was alpaca. I had never heard of alpaca as a color, only as an animal.
I finally got a chance to look it up. Alpaca is nickel silver, or German silver. As far as what color it is, I would imagine that it is a dull silvery color. But I am not entirely sure on that. Apparently nickel silver, or alpaca, is a common metal used in tableware here in Argentina.