Growing back natural hair color

I'm thinking that my situation is not typical, but here goes: I have naturally curly, shoulder-length hair which I have been coloring for years.When I retired 3 years ago, I told myself that I would stop coloring it and let the gray grow out. Well, I'm finally ready to do that, but don't know how to do it gracefully. I have been using Clairol Natural Instincts in the colors of Suede or Toasted Almond depending on what was available at the time of purchase. My natural hair color before I developed this much gray was a medium brown, but it is now about 50% gray according to what I see on my inch long roots. Any suggestions on how to make this transition a bit more gracefully?

No, my color is not washing out. The only difference between this type of hair color and the so-called permanent hair dyes (at least for me) is that the growth line of demarcation isn't as hard as it was when I used the permanent dyes. So, it isn't really washing out for me. I haven't colored it since November. Previously, coloring was a monthly event for me. So, it is now quite apparent that there is uncolored growth. So, your other ideas would be welcome!