Here is a collection of Mini-figs in almost every color possible.
I started this color hunt a few years back in 2001, when I visited LEGOLAND CA.
I met Bill Volbrect who worked in the Model Shop. At the time he had about 10 different colors.
When I got home I started to dig through all my Mini-figs. I had about 14 colors and none were complete.
So I began my hunt, looking on Lugnet, Peeron, and Bricklink.
I had to research sets that had blank Mini-fig parts.

Now some would say why don't you just use Braso and take the print off.
Well part of the hunt is to get the Figs in sets that don't have print.
So some times it a waiting game for LEGO to make figs with no print.
Its been a few years and I am now up to 50+ colors.
In the end I would like to have a full Fig, hands, head, legs, ect.. all with no print in every color.