The purple-necked rock-wallaby lives among rocky country in Queensland, Australia. Its purple appearance comes from pigment on the fur, not a permanent coat colour, and varies among individuals.
Its coat is light grizzled brown with a paler underside. Pigment may stain the face, head, neck, and shoulders from faint pink to red-purple, with variable coverage.
It uses crevices and caves among rocks as daytime refuges. Its diet includes grasses, forbs, and browse, with fruits, seeds, and insects also reported.
An extinction-risk assessment has not been added yet.