Are all chestnuts the same color, or are a liver chestnut, a light chestnut, and a light chestnut with flaxen mane 3 different colors?

Let's take the tobiano gene as an example.  Thake the color pinto (tobiano) and add to it all the other versions of colors, so you have
black-pinto
bay-pinto
yellow dun-pinto
etc,
and you'll have maybe 20 different pinto colors to start with.  The color
combinations are so many.

Shall we count:

Tobiano (15-20 combinations possible)
Overo  (15-20 combinations possible)
Yellow dun (light, medium, dark)
Blue dun (light, medium, dark)
Bay dun (light, medium, dark)
Buckskin (light, medium, dark, with or without legstripes)
Cremello/perlino/creme black
Palomino (light, medium, dark)
Smoky black (light, medium, dark)
Silver dapple (light, medium, dark and 15-20 combinations possible)
Roan  (15-20 combinations possible)
(Champagne?!?)
Chestnut (light, medium, dark/liver)
Flaxen chestnut (light, medium, dark chestnut color)
Bay (light, medium, dark)
Black
Pale black
Grey
Blazes (black horse with blaze, chestnut horse with blaze etc...)
Snips (-"-)
Stars (-"-)
Sclera (-"-)
Pangare  (-"-, light, medium, dark)

So it all depends on what you call a color.  If you only count the base color genes,
the colors are not very many (all the dun colors are for example caused by the
same gene).  If you go to the other extreme and call a silver dapple blue dun
pinto another color than a horse that is silver dapple blue dun pinto with a
blaze, then you can count the colors in the hundreds.