Decorate cookies. Prepare Color Flow icing following recipe directions. Tint portions rose, sky blue, orange and violet.
Use tip 3 in cut parchment bag and full-strength tinted icing to outline cookies. Use thinned tinted icing in cut parchment bags to flow in. Let dry 24 hours.
Use piping gel and brush to create swirls, dots, squares, lines and argyle. Sprinkle with colored sugars and attach Sugar Pearls.