My grandson had some blue dye streaks on his khaki pants - apparently the pants had been washed with some denim pants. I soaked them overnight with a Shout color catcher and then washed them normally with the color catcher in the water. The blue dye streaks were removed. I've done this before when something wet was laying on a red shirt and picked up the red dye. The color catcher really works. However, I'm not planning on using them in every wash load or throwing lights and darks into the same load - at least not on purpose. LOL!