<style>
.container {
  width: 100px;
  height: 45px;
  font-size: 10px;
  color: transparent;
  font-family: Ahem;
  background-color: green;
}
.ref {
  display: inline-block;
  width: 25px;
  height: 25px;
  background-color: blue;
  position: relative;
}
</style>
<div class=container>some text<br><div class=ref style="left: 50px; top: 10px;"></div></div>
<div class=container>some text<br><div class=ref style="top: 10px;"></div></div>
<div class=container>some text<br><div class=ref style="left: 25px; top: 10px;"></div></div>