There are 12 accepted Ocicat colours, the deciding factor as to the colour hinges on the tail tip colour. Each hair has several bands of colour and where these bands of colour fall together a thumbprint shaped spot forms.

Photos of cats of all these colours can be seen here

You may also wish to view the Ocicat Standard of Points.

Colour Coat Colour Tail tip Nose Eye Rims Paw Pads No.
TAWNY Black or brown spotting on a Tawny agouti ground Black Brick-red rimmed with black Black Black or seal brown 73
CHOCOLATE Chocolate spotting on a pale copper agouti ground Dark chocolate Pink rimmed with chocolate Chocolate Chocolate 73b
CINNAMON Bright cinnamon spotting on a lighter cinnamon agouti ground Cinnamon Pink rimmed with cinnamon Cinnamon Pink 73k
BLUE (tawny dilute) Blue spotting on a mushroom or pale agouti ground Blue Pink rimmed with dark blue Blue Blue 73a
LILAC (chocolate dilute) Lilac spotting on a pale oatmeal or dove-grey agouti ground Lilac Pink rimmed with dark lilac Lilac Lilac-pink 73c
FAWN (cinnamon dilute) Fawn spotting on a pale oatmeal agouti ground Fawn Pink rimmed with fawn Fawn Pink 73r

That's the basic 6 colours, but there are also silver versions:-
 
BLACK SILVER Black spotting on a silvery white ground Black Brick-red rimmed with black Black Black 73s
CHOCOLATE SILVER Chocolate spotting on a creamy-silver ground Chocolate Pink rimmed with chocolate Chocolate Chocolate-pink 73bs
CINNAMON SILVER Cinnamon spotting on a cinnamon-silver ground Cinnamon Pink rimmed with cinnamon Cinnamon Pink 73ks
BLUE SILVER(black dilute) Blue spotting on a blue-silver ground Blue Pink rimmed with blue Blue Pink 73as
LILAC SILVER (chocolate dilute) Lilac spotting on a lilac-silver ground Lilac Pink rimmed with dark lilac Lilac Lilac-pink 73cs
FAWN SILVER (cinnamon dilute) Fawn spotting on a fawn-silver ground. Fawn Pink rimmed with fawn Fawn Pink 73rs
Ocicats