As a matter of fact, there are several curlies going "silver". Here is a link to that discussion:

CO wash-Vo5 Kiwi Lime
Regular CO-Tresemme Naturals Silicone Free
Deep CO-Aussie 3 Minute Miracle

Shampoo-Jhirmack Silver Plus Ageless once a week
Cream-Garnier Fructis Sleek $ Shine Leave-In Conditioning
Gels-LA Looks Sport

Going silver-last hair color 4/10/15