Here's a picture. I forgot to include it with the original post.
The gouge is on the top side of the dish. I am puzzled how it happened. I was not in the house when this occurred. Anyhow, I am not terribly concerned about a perfect match. I only want to get close to the existing color. More importantly, I want to get a smooth surface. Right now, you run the risk of cutting a finger.
I appreciate the advice.