My swatches in my earlier posts which were made on bisque tiles that were either unglazed, or glazed with satin and matte finishes have a collection of seemingly numerous colors. I personally think I went crazy over the colors, thinking that I should probably satiate my curiosity and save on postage by getting all the colors of the rainbow.
The colors and additives cost me a little less than $300 in my estimation, and I could have gotten away with just spending half of that. What made me want to buy from two vendors were that the collection from Jean Nordquist was already great for painting dolls, but I got curious about the offerings of Paints and Porcelain and the owner Earleen Rowell (link here) was so nice to have given me tips about painting on porcelain that I wanted to buy from her as well. I also wanted to discover for myself the opalescent additives her store carried, which would not be for the dolls but might become useful to know and have experience with for future projects. I have plans to make chess sets in the future. (Chess sets would still break! I'm working with porcelain!)
I would recommend that if you are going to use China Paint for painting landscapes, flowers and still life, that you might want to get a good selection of assorted colors. However, if you're going to exclusively work with porcelain ceramic dolls, then just get a few colors to start. Most of the colors needed are earth tones, and you probably need 5 colors at the most, just for subtle differences in the browns and reds. Even the eye color doesn't have to be blue, it can be earth tone as well.
I'm still out of town and at a cafe, blogging. :-)