html {
  background-image: url(/images/textures/light6.png);
  color: black;
}
h1 {
  background-color: lightblue;
  color: black;
}
h2 {
  background-color: pink;
  color: red;
  text-align:center;
}
h3 {
  background-color: lightgreen;
  color: yellow;
  text-align:center;
}