Its called Iris Nevus. Though there's nothing to worry about, it does need to be documented with photos and monitored by an opthamologist.
Blue is the natural color (due only to diffraction) of the iris of the eye when the iris contains no pigments.
It got its name from its shape. It closes similar to the iris in your eye.
iris
The iris
Iris means rainbow in Greek. The name was given to the goddess of the rainbow, the flower, and the colored part of the eye.
The colored part of the eye is called the iris. The black dot in the middle is the pupil which is covered by the lens.
Iris
It got its name from its shape. It closes similar to the iris in your eye.
The colored part of the eye is called the iris. The colored part of the eye is called the iris.
The iris!
It is called the iris
Iris does mean a color because it is a color in your eye.