Pour about 1/4 cup of alcohol and about 10 drops of food coloring into a resealable zippered baggie and mix thoroughly. You can also use jars instead of baggies.
Add 1 to 2 cups of pasta to the resealable zippered baggie or jar. Shake the mixture vigorously to completely cover the pasta with the alcohol and food coloring mixture.
Let the pasta mixture sit for one hour and then turn the baggie over and let it sit for another hour. If your pasta is in jars, shake them every hour or so throughout the day. You can let the pasta, alcohol and food coloring mixture sit for as long as it takes to get the deepest color pasta you are looking for. If your pasta is not dark enough, repeat Steps 1 to 3 until your pasta reaches your desired shade. The longer the pasta sits in the alcohol and food coloring mixture, the deeper the color will get.
Drain the pasta once it has reached the desired color. Do not rinse it. Separate it into groups of like colors on a cookie sheet that has been lined with newspaper or waxed paper. Let the colored pasta dry overnight. Once it is dry, it is ready for use.