A greyish horse is called a grey horse nice and simple, so is a white horse ( called a grey that is ).
greyish brown color Taupe
The soft greyish limestone that crumbles easily is called chalk.
Celadon
The color you are referring to is often called taupe. Taupe is a neutral color that ranges from a light grayish-brown to a dark tan.
Horses are just called "horses" unless they are in a group together. When horses get in a group together, they are then called a "herd".
they are called mustangs. they are the American wild horses. Australian wild horses are called brumbys.
A dozen horses is usually called a 'string' of horses.
They are called a herd of horses.
Horses, generally.
American wild horses are generally called mustangs.
A herd of horses
a herd of horses