What is the best Feminized Purple Buds?

Please tell me who has them I am haveing a hell of a time at this because after I bought 40 of them the vendor tells me sometimes they dont turn purple! Nuts! Can anyone help?
Blessings
Jeff

most strains have more than one phenotype. so with purp strains there may be some pheno's that arent so purp, doesnt mean its a bad strain.

like when a fat women has a bunch of fat kids, every now and then she gonna pop out a skinny kid

Thank You, I understood that and thought that by buying like 40 wait les see I have:20 Hollands Hope, & 20 from attitude seeds bank and it's another Hollands something or other. I wanted to find some Feminized Purple Urkle because I saw what HB did with them WOW! I was told to turn my grow room black for 3 days before I Harvest and it really helps to give them all the color they should have. Thats just advice but I know the guy and he is at least a good guy.
Please, anyone knows where I can get some purple urkle let me know :~)
Blessings to all
Jeff