DOME by Theraganics shampoo bars work well for all hair types.  They are salon quality and safe for color treated hair. They are also curly-girl method friendly by being sulfate and silicone free.
Our toning purple shampoo is great for helping to tone down brassyness that may occur in blonde and silver/gray hair.
 
Size - Avg 3.5-4 oz
 
Ingredients:
Sodium Cocoyl Isethionate (Coconut Oil*), Sodium Lauryl Sulfoacetate (Palm Kernal*), Organic Coconut Oil, Cocamidopropyl Betaine, Behentrimonium methosulfate (and) Cetearyl Alcohol (conditioner), DL Panthenol (Vitamin B5), Hydrolyzed Rice Protein, Esential Oil & Fragrance, Violet Pigment
(*Derived Source)