It’s the Melanin for me. Melanin is a natural skin pigment. Hair, skin, and eye color in people, special skin cells called melanocytes make melanin. The amount of melanin your body makes depends on your genes. 
Melanin is an essence of coolness, empowerment, pride, and excitement of black poeple. Melanin is that glow that you can't help but emit when you are comfortable and confident in your “black” or “dark” skin.