Do you have a dark shadow beneath your eyes?
Lack of sleep can contribute to dark circles, but it's rarely the main culprit. If yours have purplish blue and temporally disappear when pressed firmly with a finger, they are probably caused by blood vessels that are visible through genetically thin skin. If the darkness is brown, hyperpigmentation this can be caused by minor trauma, such as rubbing your eyes or even sun damage. I always suggest using a vitamin packed eye cream with antioxidants! Try Norabloom Evening Primrose Eye Cream