There are a few things you can do to remove dye stains from leather seats. The first is to use a mild soap and water solution to clean the area. This will remove any built-up oils and dirt that may have been on the seat. Next, use a cloth or paper towel to dry the area. Be sure not to get any of the dye on your hands, as this will cause it to transfer onto your clothing. Finally, apply a light coat of paint or sealant to the area and let it dry completely.