ohhh now that is a good question. It is actually a Coyote Brown Ergo Suregrip Deluxe Tactical Grip with Palm Shelf. VERY hard to come by. I believe they discontinued the color to go with Combat Beige which is formally Dark Earth.
This is a message I received from an Ergo employee at a different forum.
I think we are getting rid of the coyote which was darker than the combat beige but not by much.
Our combat beige is on the light side of the desert colors. Is their something specific you want in coyote? I can look around and try to find it.
It is almost impossible to match shades between manufactures. You may even see slight variations between lots within one company.
I asked if they had any of the Tactical Delux Suregrips and he checked...sure enough, one left laying in the back. He put a Dark Earth palm shelf on it and sold it for a VERY reasonable price. (i later cerakoted the palm shelf)
Cant beat Ergo for customer service. TOP NOTCH.
Here is the pic he sent me from the shop showing the Coyote Brown Grip on the left, and the Dark Earth Grip on the right.
The palm shelf on the left is Dark Earth, and the palp shelf on the right is black.