Black: The Black horse’s entire body color is black. The black foal may be an overall mousy grey at birth, but will be black when it sheds its foal coat.
Bay: Bay horses have a body color coat that ranges from light-to-dark reddish-brown hues, and are distinguished by their black mane and tail, legs and ears rims.
Chestnut / Sorrel: Chestnuts vary in shade from a light golden red to a dark reddish brown. Quite often, the mane and tail will be the same color as the body coat but they can also have a flaxen mane and tail. Sorrels are called “light chestnuts” in some of the other breeds, but genetically chestnuts and sorrels are the same.
White: White horses are extremely rare and are born pure white and have dark eyes and pink skin with no freckles or spots on skin or hair.
Patterns
Dilutions
Modifiers 
Coat Colors of Tennessee Walking Horses - TWHBEA recognizes and records many coat colors and since most Tennessee Walking Horses are registered as foals between the ages of three to six months, it is sometimes difficult to determine the true color of the foal.
Genetic Color Chart 
Tennessee Walking Horse Colors - One Step At A Time
Maintaining The Purity of the Tennessee Walking Horse
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