The dark color under your eyes is caused by dark veins showing through the thin skin .

Some people have genetically thinner skin under their eyes. But withe growing age skin also becomes increasingly translucent as collagen decreases with age.

Dark circles are also visible as result dilation of blood inside veins which is caused due to lack of sleep .

Use  eyelastin to plump skin from the outside, which will make the veins underneath a little less visible. Its ingredients gives subtle light-reflecting pigments to further brighten the area and gentle skin-lightening