Which of the following is NOT considered a disqualification from competition?

Color variance within a breed is typically associated with a variety of acceptable colors and patterns that breed standards permit. This means that while certain colorations might not be ideal or might not win at a competition, they are often still recognized within the breed's standards, allowing the rabbit to compete. Disqualifications generally pertain to serious defects or conditions that fundamentally undermine a rabbit's conformational integrity or health.

In contrast, bowed legs, broken ears, and broken tails are generally viewed as physical defects that can significantly impact a rabbit's performance and overall health. Such issues can affect the rabbit's ability to compete successfully and thus lead to a disqualification. Therefore, the presence of a color variance that is allowed within breed specifications does not disqualify a rabbit from competition, making it the correct choice for this question.