He read something off the screen and his gray skin whitened.

Over the gray skin of the face ran little ants.

The tight, gray skin of the long face seemed to change a little, as if a picture from within was trying to form on it.

Next to it, something roughly the same size and shape, but without the gray skin.

They compared the gray skin to the texture of a human female breast.

I was taken away by people with gray skin.

The man had gray skin, and his eyes were mad with terror.

Slowly he extended his right hand and felt the alien's cool gray skin.

Elephants don't seem to mind the thousands of lines across their vast gray skin.

The woman at the end of her bed was short and had the gray skin of the dead.