Question: what is the best shampoo purple?
Answer: Joico Color Endure Violet Shampoo for toning blonde and gray hair 10.1 fl oz. ... 
Fanola No Yellow and No Orange Shampoo Package, 350 ml. ... 
John Frieda Sheer Blonde Colour Renew Purple Shampoo, 8.45 Ounces (Pack of 2) ... 
Clairol Shimmer Lights Shampoo for Blonde and Silver Hair, 31.5 Fl Oz.