We offer you our prayers and sympathy, and hope for recovery of the wounded. Either liquid or paste colors can be used to tint frostings.
Liquids are widely available and come in basic colors.
Follow the charts printed on food color boxes to create other shades or use your own combinations. Brilliant, intense colors cannot always be obtained with liquid colors because the quantity required thins small amounts of frosting too much. Paste colors are available in specialty stores and through some mail order catalogs. They come in a wide range of colors and produce either pastels or intense hues. You may want to start with a selection of basic colors and gradually build up your collection to include several shades of the same color.