What I did with this cake:
http://cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1669862&sub=1677230
I took white, grey and navy blue fondant. I probably used 1/2 white, 1/4 grey and 1/4 blue and kneaded them together and rolled out. You don't want to knead too much because it will all turn into one color! I just guesstimated how much to knead and it turned out well. You just have to eyeball it.
I also used that method for my castle cake - only I just used white and grey and marbled them together.
Quote by @%username% on %date%
%body%