Answers for "color overlay over div"

css div overlay div

#container { //goes to the bottom
  width: 100px;
  height: 100px;
  position: relative;
}
#div1{ //comes to the top
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10;
}

div color overlay css

box-shadow: inset 0 0 0 2000px rgb(0 0 0 / 67%);