How to center div vertically inside of absolutely positioned parent div

Question

I am trying to get blue container in the middle of pink one, however seems vertical-align: middle; doesn\'t do the job in that case.

Answer 1

Center vertically and horizontally:

.parent{
  height: 100%;
  position: absolute;
  width: 100%;
  top: 0;
  left: 0;
}
.c{
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  transform: translateY(-50%);
}