ALL English Bulldog Breeders of AKC Rare Colors should use the same Color Codes for registering their dogs, so as to preserve the stability of the Rare Color Lines. This is a GOOD chart, as I have conferred extensively with AKC as to what the descriptive color of their codes are.
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COLOR & DESCRIPTION AKC REGISTRATION CODES
See AKC color codes Here
Fawn Markings(008) indicate the Tan Pointed Pattern on ANY color dog.
BLACK COLORS
Black Tri
The Black Tri is easy to spot, the most common of the RARE COLORS. The black is a True Shiny Black, it looks black against black objects or in the sun. As in ALL the TRI COLORS, the tan points typically are on the eyebrows, cheeks, front shoulders(right above the chest area that is between the front legs) around the tail, and on both front & back legs. It is normal for the tan points to be absent in these areas if colored white. The nose, eyeliner, & pads are true black.
 AKC Registration should be 019-008

Black & White/Fawn Mkgs
Black Bi




Solid black & white with no Tan Point Markings or other colors.		 AKC Registration should be 019
Black & White
Black & Tan-No White-Very rare, none produces that we know of


Solid Black with tan points-Doberman markings-no white.		 AKC Registration should be 007-008

Black/Fawn markings
Black & Tan/white Markings

Solid Black with tan points-Doberman markings-minimul white. A white chest is acceptable. A True Black & Tan should not have any white on the face, legs, back, and little on the chest.		 AKC Registration should be 011-014

Black and Fawn/white markings
Black Piebald

Black circular patches, not small spots, over white anywhere on the dog.		 AKC Registration should be 019-025
Black & White Piebald
BLACK RED COLORS
Black Red Tri

Diluted Black-
Black Red & White with the Tan Pointed Pattern. This color typically looks like a black & white tri, but is discernable when the dog is against anything True Black or a black dog. The dark red color also shines through when in the sun and is typically has a darker streak down the back. 		AKC Registration should be 027-008
Black Red & White/Fawn Markings
Black Red & White

Diluted Black-
Black Red & White. This color typically looks like a black & white, but is discernable when the dog is against anything True Black or a black dog. The dark red color also shines through when in the sun and is typically has a darker streak down the back. 		AKC Registration should be 027
Black Red & White
Black Red & Tan

Diluted Black-
Black Red with tan points-Doberman markings-no white. Small white patches on the chest are acceptable. This color typically looks like a Black & Tan, but is discernable when the dog is against anything True Black or a black dog. The dark red color also shines through when in the sun and is typically has a darker streak down the back. 		There is only one Black Red code with AKC, so even if the dog has NO White, this code should be used.

AKC Registration should be 027-008
Black Red & White/Fawn Markings
Black Red Piebald

Diluted Black-
Black Red circular patches over white, but can be over other colors as well. This color typically looks like a Black & Tan, but is discernable when the dog is against anything True Black or a black dog. The dark red color also shines through when in the sun and is typically has a darker streak down the back. 		AKC Registration should be 027-025
Black Red & White/Piebald
BLUE COLORS
Blue Tri(Charcoal Tri)

Diluted Black-
Blue & White with the Tan Pointed Pattern. This is the True Slate Gray Color that should be designated BLUE. The nose, eyeliner, and pads should be self colored(color of the hair). The eyes are often light gold, green, blue, or gray. According to geneticists, the charcoal color is genetically blue as well, and is discernable when the dog is against anything True Black or a black dog. The charcoal color also shines through when in the sun and is typically has a darker streak down the back. 		AKC Registration should be 105-008
Gray & White/Fawn Mkgs
Blue Bi(Charcoal  Bi)

Diluted Black-
Blue & White with no tan points or other color. This is the True Slate Gray Color that should be designated BLUE. The nose, eyeliner, and pads should be self colored(color of the hair). The eyes are often light gold, green, blue, or gray. According to geneticists, the charcoal color is genetically blue as well, and is discernable when the dog is against anything True Black or a black dog. The charcoal color also shines through when in the sun and is typically has a darker streak down the back. 		AKC Registration should be 105
Gray & White
Blue & Tan(Charcoal & Tan)

Diluted Black-
Blue with tan points-Doberman markings-no white. Small white patches on the chest are acceptable. This is the True Slate Gray Color that should be designated BLUE. The nose, eyeliner, and pads should be self colored(color of the hair). The eyes are often light gold, green, blue, or gray. According to geneticists, the charcoal color is genetically blue as well, and is discernable when the dog is against anything True Black or a black dog. The charcoal color also shines through when in the sun and is typically has a darker streak down the back. 		AKC Registration should be 100-008
Gray/Fawn Markings
Blue Piebald(Charcoal Piebald)

Diluted Black-
Blue circular patches over white. This is the True Slate Gray Color that should be designated BLUE. The nose, eyeliner, and pads should be self colored(color of the blue hair). The eyes are often light gold, green, blue, or gray. According to geneticists, the charcoal color is genetically blue as well, and is discernable when the dog is against anything True Black or a black dog. The charcoal color also shines through when in the sun and is typically has a darker streak down the back. 		AKC Registration should be 105-025
Gray & White Piebald
Blue Fawn or Red Tone Blue

Diluted Black-
 This is the True Slate Gray Color that should be designated BLUE with blue frosting on the tips of the fawn hair, with blue etching around the color where it meets the white. The nose, eyeliner, and pads should be self colored(color of the blue hair) on a TRUE BLUE FAWN dog. The eyes are often light gold, green, blue, or gray.

Because these dogs have a double dose of "d" they are True Dilutes(True Blues).

 AKC Registration should be 100-008
Gray/Fawn Markings
Blue Fawn Brindle or Blue Red Brindle

Diluted Black-
 This is the True Slate Gray Color that should be designated BLUE with blue frosting on the tips of the fawn/red/brindle hair with blue etching. The nose, eyeliner, and pads should be self colored(color of the blue hair) on a TRUE BLUE FAWN dog. The eyes are often light gold, green, blue, or gray.

Because these dogs have a double dose of "d" they are True Dilutes(True Blues).

 AKC Registration should be 107-014
Gray Brindle/White Markings
CHOCOLATE-CHOCOLATE DILUTE-LILAC COLORS
Chocolate Dilute & Lilac Explained

Diluted Chocolate-
Any variation of chocolate that is diluted in color. The hair is usually a lighter chocolate color, thus the designation chocolate dilute.  In Lilac, the choco hair has to be diluted to the point of having a lavender haze or it is simply not a lilac, it is a chocolate dilute. You will get the lilac or dilute color by breeding Choco to Choco, hoping one carries the dilute gene. This will be more likely if your Choco has the blue lines as well.

Lilac-
This color is a combination of "d" genes that dilute black to blue, and "b" genes which are present in double dose in chocolate dogs. Because Lilac colored dogs carry a double dose of "d" they are true dilutes. Lilac color is noticeably different than blue or chocolate. The coat will have a chocolate/brownish tint in combination with blue. Lilac dogs are born this color unlike blue fawn pups who typically lose the blue overtones of their coat as they mature. Lilac dogs have a self-colored nose that has the same chocolate tint/blue combination as their coat, somewhat like the color mauve. It is a lighter/more washed out color than a blue dog's nose just as the coat color is.
NOTE: when these dogs are color DNA'd, you will see the double dose combination of dilute "dd" AND most of the time at least one little
"b", or it is NOT A TRUE LILAC.

In these Extremely rare Colors, there is no other choice but to register the exact same way as the Choco's, otherwise we will loose sight of the TRUE Choco lines.
Chocolate Tri-Chocolate Dilute Tri-Lilac Tri

The hair color on Choco's can vary slightly, but, there is no getting around the LIVER Colored nose! The nose, eyeliner, and pads should be some variation of brown, light to dark. The eyes are often light gold, green, blue, or gray.
If the nose is not liver(brown) it is NOT A TRUE CHOCO!		 AKC Registration should be 060-008
Bronze/Fawn Mkgs
Chocolate Bi-Chocolate Dilute Bi-Lilac Bi

Chocolate & White, no tan markings. The hair color on Choco's can vary slightly, but, there is no getting around the LIVER Colored nose! The nose, eyeliner, and pads should be some variation of brown, light to dark. The eyes are often light gold, green, blue, or gray.
If the nose is not liver(brown) it is NOT A TRUE CHOCO!		 AKC Registration should be 060-014
Bronze/White Markings
Chocolate & Tan-Chocolate Dilute & Tan-Lilac & Tan

Chocolate with tan points-Doberman markings-no white.
The hair color on Choco's can vary slightly, but, there is no getting around the LIVER Colored nose! The nose, eyeliner, and pads should be some variation of brown, light to dark. The eyes are often light gold, green, blue, or gray.
 If the nose is not liver(brown) it is NOT A TRUE CHOCO!		 AKC Registration should be 060-008
Bronze/Fawn Markings
Chocolate Piebald-Chocolate Dilute Piebald-Lilac Piebald

Chocolate circular patches usually over white, but can be over other colors as well, no tan markings. The hair color on Choco's can vary slightly, but, there is no getting around the LIVER Colored nose! The nose, eyeliner, and pads should be some variation of brown, light to dark. The eyes are often light gold, green, blue, or gray.
 If the nose is not liver(brown) it is NOT A TRUE CHOCO!		 AKC Registration should be 060-025
Bronze Piebald
Very Rare Blue-Chocolate Brindle

This is a fairly new & VERY rare upcoming color. The base coat is Chocolate with the brindle stripes being slate gray(Blue). The nose & pad leather is typically slate gray with a chocolate undertone, described as a mixture of chocolate & blue. At first glance, the brindle stripes will be thought to be black, but if several hairs are pulled out & placed on a pure white surface, the slate gray hairs will be strikingly evident.		 AKC Registration should be 060-007
Bronze/Brindle Markings

SABLE COLORS
Sable Tri

Sable with the Tan Pointed Pattern.
Sable is best described as a salt & pepper look with a mixture of lighter & darker hairs throughout the greater part of the dog. These two colors can differ as in red & black hairs or fawn & blue hairs. I would dare to say that 100% of True Sable colored bulldogs carry the Black Tri Gene.		 We chose to use fawn & brindle to register the sable color as it has a mixture of the lighter & darker colors

AKC Registration should be 084-008
Fawn & Brindle/Fawn Markings
Sable Bi

Sable with white markings.
Sable is best described as a salt & pepper look with a mixture of lighter & darker hairs throughout the greater part of the dog. These two colors can differ as in red & black hairs or fawn & blue hairs. I would dare to say that 100% of True Sable colored bulldogs carry the Black Tri Gene.		 We chose to use fawn & brindle to register the sable color as it has a mixture of the lighter & darker colors

AKC Registration should be 084-014
Fawn & Brindle/White Markings
Blue Sable Tri

Blue Sable & white  with the Tan Pointed Pattern. One of the two colors in the sable pattern is blue. Sable is best described as a salt & pepper look with a mixture of lighter & darker hairs throughout the greater part of the dog. These two colors can differ as in red & black hairs or fawn & blue hairs. I would dare to say that 100% of True Sable colored bulldogs carry the Black Tri Gene.		 We chose to use gray brindle to register this sable color as ALL dogs with the blue color should have the GRAY designation.

AKC Registration should be 107-008
Gray Brindle/Fawn Markings
Author: Alesia Dixon of Rare Bulldogs.com
Credits: AKC, VetGen Laboratories, Alice of Black Gold, HealthGene, UC Davis Veterinary Medicine