Here are a few color baking basics to help you get the best results.
Liquid color is the most common and best for creating pastel shades.
Since it tends to thin frosting, add a little powdered sugar to keep the right consistency. Paste color is also perfect for tinting sugar and coconut. Just add a few drops to a plastic bag and shake. Pastes come in a variety of colors and are capable of creating almost any shade including deep, dark colors. Use a toothpick to apply a little bit at a time.