Grey dun?

[Woodstock]

I bought this lovely grey mare and am wondering exactly what colour she is http://www.horseworldonline.net/horse/profile/31112
My best guess is grey dun but i am probably wrong

[Azureskies]

It's hard to tell without seeing her as a foal before the grey took over. All I can really tell about the base coat is that it's bay.

[Kilynn]

Definately a bay base judging from the parent I can see and her 2 foals. She may well have dun but unless she passes it on from a stallion that clearly doesn't have that color and without knowing what she looked like as a foal, you won't know.

[Woodstock]

thank you guys