B-gene

 

Theese genes controles the colours.
There are three different colours in cats.

[BB] [Bb] Bbl] [B-] Black
[bb] [bbl] [b-] Chocolate
[blbl] Cinnamon 

B dominates b and bl
b dominates bl

Cinnamon comes from the abyssinians/somalis.  It exist only within Oriental, Abyssinians/Somalis, Ocicats.