There are three varieties of markings recognised as appaloosa. The leopard spotted which has dark spots all over on a light background. The blanket spotted which has spots of any colour on its rump and the snowflake spotted which has white spots on any other coloured background.
A piebald horse is one which is white and black. A skewbald is white and any colour other than black. The coat has large irregular patches of each colour and has black skin under the coloured area and white or pink skin under the white coat. The lack of pigmentation may also show in the eye which may be blue (known as wall eye). Horses which have patches of three colours are referred to as coloured.
An albino has white hair, white skin and wall eyes (lack of pigment in the iris of the eye) and is completely lacking in pigmentation. The cremello is similar but with cream hair.