I started with a box of Wilton's Natural Colors Fondant, multi pack. Since I was only using this for accent pieces I didn't need a whole lot. The multi pack comes with four colors-- light brown, dark brown, natural pink, and black. To do this effect you will need mostly light brown with a tinge of the dark brown and black.
The first thing I did was mix a small amount of the dark brown with a small amount of the light brown, maybe half and half, to achieve a medium brown color. Set that aside.
Here's my finished leopard print shoe.