Edit in JSFiddle

div {
  width: 280px;
  height: 150px;
  background-repeat: no-repeat;
  background-image: url('http://ezcode.kr/study/css/img/blend.jpg');
  float: left;
  margin: 10px;
}
hr {clear: both}
.gr {
  background-image: linear-gradient(to right, blue 0%, red 100%);
}

#blend {
  background-image: 
    url('http://ezcode.kr/study/css/img/blend.jpg'), 
    linear-gradient(to right, blue 0%, red 100%);
  background-blend-mode: normal;
}
<!DOCTYPE html>
<html lang="ko">
  <head></head>
  <body>
    <h1>background-blend-mode</h1>
    <p>옵션을 변경하여 그라디언트와의 합성모드를 확인하세요.</p>
    background-blend-mode : <select id="select">
     <option value="normal">normal</option>
     <option value="multiply">multiply</option>
     <option value="screen">screen</option>
     <option value="overlay">overlay</option>
     <option value="darken">darken</option>
     <option value="lighten">lighten</option>
     <option value="color-dodge">color-dodge</option>
     <option value="saturation">saturation</option>
     <option value="color">color</option>
     <option value="luminosity">luminosity</option>
   </select>
    <hr>
    <div id="blend"></div>
    <hr>
    <div></div>
    <div class="gr"></div>
  </body>
</html>