Why are vampires so pale?

Answer 1

Example: When we are embarassed, our faces flush because blood rushes to our faces.

Vampires have no blood in their veins, they are the undead, it's impossible for a vampire not to be pale. That, and if they are never in sunlight, their skin will never darken.

Since they can't be near the sun,they can't have dry or tan skin. Isn't that why we are tan and sweaty?