My natural color is very dark brown so gray looks horrible!!! I used to use the non-permanent for a long time. They aren't as hard on my hair. Lately though I've been using permanent color and then just do the roots when they come in. It seems no matter what brown color I buy it turns out the same. I've used several brands- Clairol mostly but they have several types. My sister goes to the hairdresser and I think hers looks better but I'm too cheap :D