Mirab's_DD your block is great I love to use black makes all the colors pop. I used it once lets just say did not stay black as we have 2 long white haired Turkish Angora cats that reside in our home they are so cute but hairy. One has crystal blue eyes and his brother has one blue and one greenish-yellow eye like the cat in the photo below.
http://en.m.wikipedia.org/wiki/File:...Angora_Cat.jpg