.row {
  display: flex;
  flex-wrap: wrap;
}

/* Create 6 equal columns that sits next to each other */
.column {
  flex: 16%;
}

.column img {
  margin-top: 15px;
  vertical-align: middle;
  width:90%
}




.container {
  position: relative;
}

.overlay {
  position: absolute;
  top: 10%;
  bottom: 0;
  left: 0;
  right: 0;
  height: 20%;
  width: 70%;
  opacity: 0;
  transition: .5s ease;
  background-color: #008CBA;
  
}

.container:hover .overlay {
  opacity: 1;
}

.text {
  color: white;
  font-size: 14px;
  position: absolute;
  font-weight: bold;
  top: 50%;
  left: 45%;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
}