The AKC standard for english bulldogs does not list black as a desirable color. Color of Coat
The color of coat should be uniform, pure of its kind and brilliant. The various colors found in the breed are to be preferred in the following order: (1) red brindle, (2) all other brindles, (3) solid white, (4) solid red, fawn or fallow, (5) piebald, (6) inferior qualities of all the foregoing. Note: A perfect piebald is preferable to a muddy brindle or defective solid color. Solid black is very undesirable, but not so objectionable if occurring to a moderate degree in piebald patches. The brindles to be perfect should have a fine, even and equal distribution of the composite colors. In brindles and solid colors a small white patch on the chest is not considered detrimental. In piebalds the color patches should be well defined, of pure color and symmetrically distributed.
The only thing that is a disqualification in a bulldog according to AKC is a brown or liver nose. In all the years I have shown I have only seen one person try to show a black bulldog and they were not very happy when they did not place with there dog and the judge told them why they did not place nor where they happy when several long time big named handles gave them there opinion about there dog. They entered in a larger specialty show and it didnt go over as well as they wanted and they were quite vocal about it
That being said you find color of all kind in just about any dog so people dont always understand not to mention most people dont know alot about bulldogs.
Some breeders have problems with breeders that breed stricktly for color instead of paying attention to the health and temperment of the dogs they breed. You find them all over the internet with breeders charging outrages prices for there "RARE" colors. And you will find alot of them claim to have alot of champions in there pedigree.
Either way you have a cute puppy and you know what he is and love him regardless of his color, drool, wrinkles, and stinky little bum
I think I would probabley judge the person asking and if there being rude and a smartass I would give them a smart *** answer back
And if it was someone that just really doesnt know about bulldogs and is just curious answer them and explain about his color. You find alot of people especially when you show bulldogs that really just dont know anything about them and they dont realize how great they are or how much work they can be. Since they come in all shapes and sizes and you can see that if you go to a show especially a specialty show you will see short, tall, fat, skinny and a variety of red,white,fawn,and brindle colors. Which for those of us that love bullies is one of the greatest things to see 50 to 200 bullies (Depending on the size of the show)all in one place and all looking there cute bullie selves