This video shows how to color white fondant icing using concentrated paste colors.

You will need:

White fondant icing
Concentrated gel/paste food colors
Toothpicks
Icing/Confectioner’s Sugar
Plastic wrap

Buy fondant here: http://amzn.to/1yconZd
Buy food coloring gel here: Gel Colors – http://amzn.to/12k2X3h