.col a {
  border-radius: 4px;
  overflow: hidden;
  transition: box-shadow 0.25s;
}
.col a:hover {
  box-shadow: 0 6px 20px rgba(0,0,0,0.13);
  background: rgba(44,95,138,0.06);
}
.col a .img-fluid {
  position: relative;
}
.col a .img-fluid::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(44,95,138,0.06);
  opacity: 0;
}
.col a:hover .img-fluid::after {
  opacity: 1;
}