I have had some great experiences using other Shout products so of course I was excited to try the Shout Color Catcher! I'm very picky about my laundry and how it's done, I don't like certain things to go together in the wash and I meticulously read laundry labels. Sometimes if the load I'm washing is just old towels and things I have just used for cleaning I will throw them in the wash together even if the colors are not similar because it doesn't matter to me whether it bleeds on the other or not. I wanted to test the Shout color catcher out on these before chancing it on my good clothes so I put it in with some light yellow towels and some navy blue towels that I had used to clean with. I had washed these same towels together numerous time and hadn't experienced any color changes but when I used the Shout Color Catcher my yellow towels turned blue. I didn't use the rest of the box of the color catchers because I didn't want the same thing to happen to my good clothes. It didn't do what it had promised at all, in face it had made it worse. Would not recommend at all.