Colors in Equines
There are a number of sites dedicated to showing the colors of horses, but the US model collector (or equine breeder) should be aware that a number have inaccuracies.  Most of this stems from difference in terms from Europe to the US.  The best books on color are by Phil Sponenberg - Horse Color, and Equine Color Genetics.  The latter has a section on Donkey color, although some of that information has now been updated.  A color packet (with genetic information, and color copies of donkey photos as illustrations) is also available from ADMS

Most equine color terms are universal, but each breed may have specialized usage.  We cannot cover every shade, genetic factoring, or description here, but we will touch on those that are the most misunderstood, and where they differ specifically in donkeys and mules.
This is a GRAY horse.  The GRAY horse is born dark, and whitens (lightens) with age, over a period of 10 years or so. 
This horse is also GRAY.
What are the HORSE colors?

There are 2 pigments that make up color.  Thes 2 pigments, red and black, are then modified in a number of different ways to make up all the different coat colors.  They can be combined, lightened, darkened, mixed with white (which is non-pigmented) in a number of patterns.

Reading the color genetics books is the best way to understand the colors, but we'll give you some visuals and some BASICS. (Remember, all of this is oversimplified!)

Chestnut/sorrel
Palomino
Cremello
Bay
Buckskin
perlino
Black
Brown
Grulla
Dun
Gray
White
Roan
Pinto/Paint
Sabino
Appaloosa
Markings
More

Mule colors
Donkey colors
Zebra Stripe Patterns

A lovely aged Connemara pony stallion (Fleabitten gray) at the HARAS des Saintes, FRANCE. 
NEXT             DRAFT       APPY  

MOREAPPY   APPYS2     LOUDAPPS

LOUD APPS2     PINTOS   SPOTTED

SPOTTEDSIRE     COMBOSPOTS

   ROANS   PONYMULES    HINNIES 

         
CHANGING   CHANGE 2

    
MULEFOALS    MOREDRAFTS

 
  POITOUMULES         DUNS    GRAYS

HORSE COLOR

CONFORMATION      COMPARISONS

COMPARE2      MISC            
HOME

Registration form for Donkeys & Mules (ADMS)