I always say chocolate French Bulldogs are even prettier in person. Sometimes just looking at pics online do not do them justice.
Here’s the genetics on the chocolate color which is found on the B-locus. It’s a recessive gene. In order for your Frenchie to express chocolate on their coat they must inherit two copies of the gene. Chocolate is not a testable gene as of right now and the only way to know if your dog carries chocolate is to breed to chocolate frenchie or one who carries chocolate.
Just as with the other color variations you can have brindling in the coat or solid. The gene that determines this is on the K-locus. If they inherit one or two copies of the brindle (Kbr) gene they will express brindling in their coat.
If not copies of the brindling gene , then they will be solid.
Chocolates may also have tan points which has to do with the A locus. If they inherit one or two copies of the tan points gene, At, they will express tan points.
You can also have chocolate pied Frenchies which is located on the S-locus. The Frenchie must inherit two copies of the gene for the pied expression. We have not had a little chocolate Frenchie.