Isabella Lilacs are the most rare color of French Bulldog for enthusiast at the moment. This rare color is predominantly owned by breeders and used for adding more offspring to the French Bulldog gene pool. French Bulldog An Isabella Lilac Frenchie carries to copies of the dilute D-Locus d/d and two copies of the recessive B-Locus b/b (testable chocolate). If the Micro Frenchie at hand does not carry this dna combination, it is not an Isabella. The shade of these Frenchies can visually be tricky. They have a purple/chocolate tint depending how the coat appears. Some have a base color of blue within the hair and the tips chocolate giving it a more shimmery look. Others may have base of chocolate with the hair and tips being blue, which makes the Frenchie appear more like champagne shade with a purple tint. A Isabella Lilac Frenchie currently ranges from $10,000 to $100,000. Again, these rare shades are owned by breeders and still in the early stages of refining the quality of these rare French Bulldogs.