Doreen said...
I have tried all the clays. I like Kato the best! Here are a few resources for color mixing. I've posted on my blog about some of the tools I use
http://www.shadesofclay.com/more/Images/Colour%20Mixing%20Chart.jpg
http://polymerclay.craftgossip.com/kato-recipes
http://www.shadesofclay.com/more/Color%20Recipes.htm
http://doreenwilley.blogspot.com/2009/05/kato-polyclay-color-mixing-guide.html (expensive, but really handy)
http://doreenwilley.blogspot.com/2009/02/more-about-color-mixing-and-matching.html (I love this!)
Hope this helps :)
I am writing this whilst sat on a bag of crumbly Kato to try and warm it up to make it less crumbly ;)The 3 in 1 color tool Doreen mentions in the last post is available from amazon.com but not the UK amazon - so typical!