Blueness of the skin
It is typical in many newborn babies for their hands and feet to look blue. Babies who have a pale skin often show a bluish mottling of the skin all over their bodies when undressed. In both cases this is insignificant, and it disappears as the baby gets older.
Birthmarks
Most babies have a collection of red, mottles spots on the backs of their necks when they are born. These also commonly occur in two other places: between the eyebrows and on the upper eyelids. These blotches disappear gradually in most cases, and nothing needs to be done for them.