To help people better understand Bulldog coat color here are some examples of them!

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.

RED

RED AND WHITE

RED BRINDLE and WHITE

RED and WHITE / Black Markings

RED PIEBALD

RED BRINDLE PIEBALD

RED with BLACK MASK

FAWN and WHITE

FAWN with BLACK MARKINGS

FAWN BRINDLE PIEBALD

WHITE

DARK BRINDLE

BRINDLE / BLACK MASK

BRINDLE PIEBALD

Brindle

BRINDLE and WHITE