I had never seen or heard of a chocolate, liver, or blue puppy back in the 80's and 90's when I showed. Not until now, when I started back and started to research and learned what was happening to others. I know some people love the other colors - not standard. But IMO I prefer staying within the standard.
Here is a link form TYCA on this issue:
http://ytca.org/frame_index2.html Go to frequently asked questions.