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<!DOCTYPE html>
<html>
<head>
<style>
.container {
  position: relative;
  width: 50%;
}
.image {
  display: block;
  width: 100%;
  height: auto;
}
.overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: #008CBA;
  overflow: hidden;
  width: 100%;
  height: 0;
  transition: .5s ease;
}
.container:hover .overlay {
  height: 100%;
}
.text {
  white-space: nowrap; 
  color: white;
  font-size: 20px;
  position: absolute;
  overflow: hidden;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
}
</style>
</head>
<body>