* {
  box-sizing: border-box;
}

body {
  background-color: #eee;
  color: #555;
  font-size: 1.1em;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.container {
  margin: 1em auto;
  width: 100%;
  max-width: 814px;
  position: relative;
}

.container-2 {
  /* uncomment this if you want to isolate the contents of the container */

  opacity: .99;
}

.container-1 img {
  max-width: 100%;
  mix-blend-mode: luminosity;
}

.container-1 h1,
.container-2 h1 {
  position: absolute;
  bottom: 0;
  color: white;
  text-align: center;
  font-size: 5vw;
  width: 100%;
  text-transform: uppercase;
  margin-top: 5em;
  background-color: red;
  padding: .5em .25em;
  mix-blend-mode: difference;
}

.source {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  mix-blend-mode: overlay;
}

.container-4 {
  border: 1px solid #aaa;
  padding: 1em;
  background-color: white;
}

.container-4 h1 {
  width: 100%;
  text-align: center;
  font-size: 7em;
  font-weight: bold;
  isolation: isolate;
  letter-spacing: -5px;
}

.container-4 h1 span {
  display: block;
  color: deepPink;
}

.container-4 h1 span:last-child {
  margin-top: -1em;
  color: #1AD6AC;
  mix-blend-mode: difference;
}