<p>「君が笑ってくれればいい。」</p>

body {
  background: linear-gradient(125deg, #009, #f00) fixed, url(http://webcreatorbox.com/sample/images/beach-footprint.jpg);
  background-repeat: no-repeat;
  background-blend-mode: screen;
  background-size: cover;
}
p {
  font-family: Meiryo, "Hiragino Kaku Gothic Pro W3",sans-serif;
  text-align: center;
  margin-top: 150px;
  color: #fff;
}