Horse Fur-coats List Available In StoryMode.

-Grey Overo = Tumbleweed Stable
-Overo = Can be stolen / found
-Splashed White = Can be stolen / found
-Tobiano = Can be stolen / found

-Palomino Dapple = Valentine Stable
-Silver Tail Buckskin = Tumbleweed Stable
-Black = Can be stolen / found
-Buckskin = Can be stolen / found

-Dark Bay = Strawberry Stable
-Rose Grey = Van Horn Stable
-Perlino = Can be stolen / Found next to Brandywine Drop in Roanoke Valley.




-Leopard = Van Horn Stable
-Brown Leopard = Tumbleweed Stable
-Blanket = Can be stolen / found X
-Leopard Blanket = Can be stolen / found
-Few Spots = Can be stolen / found

-Red Chestnut = Can be stolen / Found at the West of Lake Owanjila
-Rose Grey Bay = Blackwater Stable
-Black = Saint Denis Stable
-White = Can be stolen With Glitch in Chapter 3(Male) / Female Found at Lake Isabella
-Warped Brindle = Can be stolen / Found at the Wapiti Indian Reservation

-Iron Grey = Valentine Stable (This Iron Grey Ardennes War Horse was a pre-order bonus.)
-Bay Roan = Scarlett Meadows Stable
-Strawberry Roan = Van Horn Stable




-Mealy Chestnut = Can be stolen / found
-Blond Chestnut = Can be stolen / found

-Sooty Buckskin = Scarlett Meadows Stable
-Chocolate Roan = Valentine Stable
-Seal Brown = Strawberry Stable
-Cremello Gold "Buell" = Can be obtained exclusively as part of "The Veteran IV" Stranger Side Mission quest.

-Dapple Dark Grey = Valentine Stable
-Piebald Tobiano = Can be stolen / found
-Flaxen Chestnut = Can be stolen / found




-Grey = Can be stolen / found + Valentine Stable
-Chestnut Pinto = Can be stolen / found
-Black = Can be stolen / found
-Silver Bay = Can be stolen / found
-Buttermilk Buckskin = Can be stolen / found at Pronghorn Ranch

-Amber Champagne = Scarlett Meadows Stable
-Silver Dapple Pinto = Blackwater Stable

-Palomino = Can be stolen / found + Valentine Stable
-Bay Roan = Can be stolen / found + Valentine Stable
-Bay = Can be stolen / found
-Flaxen Chestnut = Can be stolen / found
-Liver Chestnut = Can be stolen / found at Pronghorn Ranch

-Tiger Striped Bay = Can be stolen / found in New Austin (Rio Del Lobo Rock)
-Grullo Dun = Can be stolen / found
-Wild Bay = Can be stolen / found




-Reverse Dapple Roan = Saint Denis Stable
-Blue Roan = Can be stolen / found
-White Roan = Can be stolen / found




-Raven Black = The Raven Black Shire Horse is given to You during the mission "Exit Pursued by a Bruised Ego" Chapter 2
-Light Grey = Can be stolen / found
-Dark Bay = Can be stolen / found




-Sorrel = Can be stolen / found
-Red Chestnut = Can be stolen / found

-Mahogany Bay = The Mahogany Bay Tennessee Walker is the first playable horse Given Arthur Morgan.
-Red Roan = Can be stolen / found + Valentine Stable
-Flaxen Roan = Tumbleweed Stable
-Black Rabicano = Can be stolen / found
-Dapple Bay = Can be stolen / found
-Chestnut = Can be stolen / found
-Gold Palomino = Can be stolen / found at Tumbleweed&Pronghorn Ranch

-Dappled Black = Valentine Stable
-Brindle = Strawberry Stable
-Blood Bay = Can be stolen / found
-Dapple Grey = Can be stolen / found
-Seal Brown "Rachel" = It becomes available after completing Epilogue - Part 1

-Gold = Saint Denis Stable
-Dark Bay = Blackwater Stable
-Silver = Tumbleweed Stable

https://rdr2map.com
Has a Few of the Wild horse spawns

And GTA Base for detailed info on these Horses as well as online only Horses/Coats
https://www.gtabase.com/red-dead-redemption-2/horses/#sort=attr.ct90.frontend_value&sortdir=asc&attr.ct5.value=rdr2-story&page=1

Hope This Helps you with your Coat Collecting!