div 
{
  padding: 20px;
  margin: 5px;
  float: left;
}

#parent-div
{
  width: 500px;
  background: #BDBAC2
}

#box-one
{
  background:#5497fc;
  width: 70px;
}

#box-two
{
  background: #17a4ba;
  width: 70px;
}
#box-three
{
  background: #84b12b;
  width: 70px;
}