It sounds like you're describing a navy blue T-shirt featuring a rabbit print. This type of T-shirt would likely have a navy blue base color with a graphic design or illustration of a rabbit printed on it. Rabbit prints can vary in style, ranging from realistic depictions to more stylized or abstract representations of rabbits.
Such a T-shirt could be a fun and whimsical addition to a casual outfit, offering a playful touch to your look. Navy blue is a versatile color that pairs well with a variety of other hues, making it easy to incorporate into different outfits. Depending on the specific design and material, this T-shirt could be suitable for everyday wear or for more relaxed occasions.