Well, it depends on the marking and where it is located on the horses body.
Facial Markings:
Star- small white spot on a horses forehead
Strip/Stripe- long, skinny, white stripe that runs down a horses face, and ends at/before the nose
Blaze- long, thick stripe of white that runs down the horses face but stops at or before the nose, and does not touch the eyes
Bald- white covering a horses face almost entirely
Snip- white marking on a horses nose area, between or on nostrils
Lip- a white spot on a horses lip
Leg Markings:
Coronet- a white strip that goes all around the coronary band
Half-Cannon: a white marking that runs halfway up the cannon bone
Half-Pastern: a white markings that runs halfway up the pastern
Sock- a white markings that ends slightly above the fetlock joint
Stocking: a white markings that runs all the way up the leg but ends at the knee
Ermine spots: colored spots that are on the coronary band on top of a white leg marking
Other Markings:
Brand- A design burned into the skin to identify an animal
Freeze Brand- A brand made by freezing instead of heat. The hair grows in white. Usually letters or numbers are used.
Scar- A permanent mark left by an injury that has healed.
Birdcahtcher Spots- random white dots on a solid-colored horse's body
A snip is a small, white marking on a horse's muzzle between the nostrils. It can vary in size and shape, and is a common facial marking in horses.
Dapple is not a color but a marking. Dapples can appear on any colored horse though they are most common on grey horses and are usually considered a sign of good health.
Gypsy Vanner's can come in all equine colors, with black and white pinto the most common color and marking.
the quarterhorse is the most common
A star on a horse's head refers to a white marking that appears in the shape of a small star on its forehead. This marking is purely cosmetic and does not have a specific meaning in terms of the horse's behavior or characteristics. It is simply a unique and distinctive feature of the horse's appearance.
brown is the most common.
A sock on a horse's leg refers to a white marking that extends from the hoof to just below the fetlock joint. It is a common marking found on various horse breeds and does not have a specific meaning other than being a coat pattern.
The American Quarter Horse
the american quarter horse
American quarter horse and paint/pinto there are also many more, but these are two of the most common
Brown
That would definitely be the American Quarter Horse.