Using a large bowl mix up your favorite cake mix according to directions.
When fully mixed, add three "drops" of orange food coloring. Add more coloring if you desire a deeper/stronger color. Fill cupcake liners 3/4 of the way full. Bake according to package directions.
Remove cupcakes from oven and let cool.
Mix vanilla icing with purple gel color to reach desired shade of purple.
Ice cupcakes using offset spatula.
Place ghost and candy corn decoration on top of each cupcake.