Horse colors were much the same as today, but old records show different some different names for them.
Some of the common ones are listed below. Many terms are in French, because that language was used in the Tudor court.
Bausan (French, Bausant, Baucens, Baucyn; Italian, Balzano; Middle English, Bausond) "white spots on a colored background", hence Baybauson, Sorbauson, Sorelbauson, etc. Refers to the white points.
Bay (French, Bai; Spanish, Bayo; Latin, Badius) A chestnut colored body (Light, bright, dark, or brown) with black points. It is the black points that distinguish a bay from a chestnut.
Bayamblanc (French) Bay or Chestnut with white points.
Baybauson (French) Bay or Chestnut with white spots.
Bayclere (French) A brightly colored bay.
Chestnut A chestnut colored body (Light, bright, dark, or brown) with points of the same color.
Dappled Marked with round apple sized spots. Therefore a "dapple gray" horse has dark spots on a gray background.
Grisel (French) Gray
Griselferraunt (French) Gray with Iron gray points.
Grisliard (French) Very small spots of white on a gray background
Morel (French) Shiney Black.
Piebald Two different colors, strictly speaking black and white. See also Skewbald.
Skewbald Two different colors, generally large, irregular patches of white on a different colored background other than black. They are often tri-colored since they include bay and chestnut colors. See also Piebald.
Sorel or, less common, Sor (French; English, Sorrel) A bright chestnut color, reddish brown.
Scroll down to see some photos or the colors.(I keep adding more when I find them.)