Which feature gives rabbits their unique ear coloring in certain breeds?

The feature that contributes to the unique ear coloring in certain rabbit breeds is the presence of dark colored fur around the ear edges. This distinctive coloration can enhance the visual appeal of the rabbits and is often a defining characteristic in breeds that exhibit such traits. The dark fur at the edges may create a contrast with the rest of the ear or the body, making the ears stand out and appear more prominent.

While color patterns in the fur can influence overall appearance, they don't specifically account for the coloration around the ears. The length and shape of the ears are more about the structural attributes of the rabbit rather than their coloring. Therefore, when considering what most directly affects ear coloring, the dark fur around the edges is the most relevant feature.