Dark circles, technically known as periorbital hyperpigmentation, may turn as blue, black, purple or brown, depending on the natural skin tone of the person. This may lead to reddish-blue tint, black pigmentation, light brown pigmentation and dark brown pigmentation around the eyes. These dark circles are not a matter of medical concern but give you a tired look and an unhealthy appearance. These periorbital dark circles make you look older than your actual age and a little unappealing.