Specialty stores might have a red or green macaroni, but now you can easily make any color that you would like by buying and mixing food coloring and rubbing alcohol. Liquid food coloring works the best. Grocery stores carry basic primary colors. They can be mixed to make different shades and secondary colors. Pour one-fourth cup rubbing alcohol into a 12 to 16 oz cup.
Disposable cups are the best.
Add 5 to 15 drops of a food coloring of your choice. Two different colors can be added to one cup for extra colors. The colors blue and yellow added to the rubbing alcohol will make green. The colors red and yellow added to the rubbing alcohol will make orange. The colors red and blue added to the rubbing alcohol will make purple.