Here is a link to an intersting article on Mid-Atlantic Koi club web site:
http://www.makc.com/Kikokuryu_Kodama.pdf Notice the colors.
I'm attaching photos of a Doitsu Lemon Hariwake male I have. It has a few pinkish spots that are more obvious in real life than the photos. I've always considered them defects, but they did get me thinking about color possiblities.