If you need to get red dye out of white clothes, begin by figuring out of the clothing is washable. If it is, create a solution of hot water, dish soap and ammonia and soak the clothes in it. This will allow the red dye to weaken. Once the clothing has soaked for at least 30 minutes, rinse the clothes and then run through the washing machine. Be sure to check the stain before drying the clothes.