To get the royal blue velvet color, remember the toothpickful of violet paste food color; if forgotten, the cake will bake up turquoise in color.
Use paste food color to achieve the royal blue velvet color. If you use liquid or gel food color, your cake color will vary.
To make candy garnish, line cookie sheet with foil, and spray with cooking spray. In 2-quart saucepan, stir together 1 cup sugar, 1/2 cup corn syrup and 1/4 cup water. Cook and stir over medium heat until sugar dissolves; heat to boiling. Without stirring, heat to 300°F to 310°F, or until a small amount of syrup dropped into cold water forms hard, brittle threads. Remove from heat and stir in desired amount blue food color. Pour onto cookie sheet in random design. Let cool, and break into pieces. Garnish cake with candy pieces as desired.