Dear doctor, my body colour is average fair, but my penis is too black including the top of my penis where no skin coverage, any solution for this pro?

Doctor can check: One can ask one's primary care doctor to look, if one is worried. A darker bottom penis and lighter top is normal if it looks symmetrical and has been that way since puberty started. Doctors check the penis at annual check-ups, but rarely say anything if such coloring is there, as it is considered normal. Lighter skin due to loss of color, or color changes due to inflammation, may need treatment.