Decorate cookie designs also 1 day in advance.
Tint royal icing winter blue, spring pink, pastel green and pastel pink following color formulas above. Reserve remaining white icing. Thin all icing.
On imprinted designs, use a cut disposable decorating bag and thinned icings to fill in one of the pattern areas on each design. Work one petal or wing area at a time. Immediately use tip 2 and thinned icings in another color to decorate detail area. Let dry until set, about 15 to 20 minutes.
Tip: Multiple areas of the design can be decorated at one time, as long as the areas don't touch each other. Example, both butterfly or dragonfly wings can be filled in and allowed to set before the body is filled in with icing.
Continue filling in designs until all areas are filled in. Let dry until set, about 15 to 20 minutes.