INTRODUCTION TO BREED NUMBERS

ASIANS 

BURMESE
68 Tiffanie   27  Brown
72 Self 27a Blue
72 38    Spotted Tabby  27b   Chocolate
72 41  Classic Tabby 27c Lilac
72 42  Smoke 27d Red
72 43 Burmilla 27e Brown Tortie
72 44 Mackerel Tabby  27f Cream
72 45 Ticked Tabby 27g  Blue Tortie
    27h Chocolate Tortie
    27j  Lilac Tortie

The colour letter is then added as per the standard GCCF list.

Asian Full Expression Colours  

Asian Burmese Colour Restriction Colours
- Black    q Brown
a Blue aq Blue
b Chocolate bq Chocolate
c Lilac cq Lilac
d Red dq Red
e Black Tortie eq Brown Tortie
f Cream fq Cream
g Blue Tortie  gq Blue Tortie
h Chocolate Tortie  hq Chocolate Tortie
j Lilac Tortie jq Lilac Tortie
n Caramel  nq Caramel
fn Apricot fnq Apricot
p Caramel Tortie pq Caramel Tortie

Asian Burmese Restriction Colours is defined by adding the letter ‘q’ as you will see above.
The colour restriction modifies the Full Expression colour so that black becomes brown etc.
Full Expression colour is much darker than Burmese Colour Restriction.
Silver is indicated by adding ‘s’ to the appropriate number—for example 72 43sq would be a Brown
Shaded Silver Burmilla (Burmese Colour Restriction).
All Self and Tortie colours showing the Burmese Colour Restriction are registered as Varients
because they are identical in appearance to Burmese cats. 
This is shown by adding ‘v’ to the Asian breed number 72.
For example 72av would be a Asian Blue Varient (Burmese type and colour).

Note that varients are always shorthaired Asians as Tiffanies are permissible in all colours.