Here are some possibilities:
* White: Many rabbits have white tails.
* Black: Some breeds have black tails, especially those with black fur.
* Brown: Similar to black, brown rabbits might have brown tails.
* Grey: Grey rabbits can have tails that match their fur color.
* Other colors: Depending on the breed, you could see orange, red, yellow, or even multi-colored tails.
Important Note: A rabbit's tail color is not a reliable way to determine its breed. To identify a rabbit breed, it's best to look at a combination of physical traits, such as body type, ear shape, and fur length.