.other-project-wrapper .overlay {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100%;
  width: 100%;
  opacity: 0;
  transition: .5s ease;
  background-color: #008CBA;
}

.other-project-wrapper:hover .overlay {
  opacity: 1;
  background-color: rgba(0,0,0,0.5);
}

.other-project-wrapper .overlay h4,
.other-project-wrapper:hover .overlay h4{
  opacity: 1;
  color: white;
  font-size: 20px;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  text-align: center;
}