If you once had black tees or jeans and they are now a dull, drab, smokey gray color you can revive their original color by dying them with a homemade brew of coffee. Steep 1/4 cup of coffee grounds in 1 gallon of water for 10 minutes. Pour this brew into the washer. Add your black clothing and run on the gentle cycle without soap. The tannins in the coffee will infuse the fibers in the fabrics with deep dark color compounds. If you should have coffee residue in your washer, you can remove it by adding 1 cup of white vinegar and then running the rinse cycle. Do this before you wash any other apparel.