The first time I got Grand Daddy Purple it had some purple in it, this wasn't from a co-op, then I got some from a co-op, and it didn't have purple in it. However, I know they were both the same strain because they smelled identical and gave me the same effects. Really good stuff, and a popular choice for people with stomach problems such as Crohn's, or IBS.

And just a side note, God damn I love the smell when you walk into a co-op hehe