because they were colored as blue..
blue or red colored skin changes
Many pit bulls that are born blue colored have a pigment in their skin that makes them that color.
Classic Sonic is blue with skin covered arms and skin colored eyelids.Modern Sonic is blue with skin colored arms and blue eyelids. Modern sonic is taller than classic sonic. Modern Sonic is a darker colored blue than Classic Sonic. Sonic in the original sonic the hedgehog has 3 quills facing downward and the new sonic has 6 quills facing downward. It depends on the game/show. Google it if you ant to actually see what he looks like.
Blue moles, which are slightly raised, colored by pigment deep within the skin, and most common on the head, neck, and arms of women.
Arimaspians are cyclopean humanoids with yellow-colored hair and skin color ranging from light blue, purple, and pink.
Argyria
"Piel clara" = light colored skin "Caucásico" = Caucasian
Chickens that lay different colored eggs such as brown, green, blue or pink are no different then white egg laying chickens. A chicken that lays different colored eggs will have different colored skin, but that's it.
Eyes that appear blue or green have lower amounts of pigment in the iris than darker colored eyes, just as fairer skin has less pigment than darker skin. Pigment in the eyes and skin often correlate. Blue eyes are rarely seen outside of the Caucasian race; usually, if a person has blue eyes, he or she also has a pale complexion.
Genetics. Why is your skin the color it is?
No.
A cat's skin color matches its fur pattern.black cats have black colored skinwhite cats have pink colored skin (it would be white but you are seeing the blood vessels underneath)orange cats have orange colored skintabby cats have tabby colored skincalico cats have calico colored skinetc.