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HTML

              
                <div class="wrapper">
		  <section class="how-to">
			    <h2>mix-blend-mode Demo &ndash; 
				      <span>How To</span>
    			</h2>
			    <div class="info">
				      <h3>Color Buttons</h3>
				      <p>
					        You can change the page background color by clicking one of the color buttons at the top.  
				      </p>
				      <p>
					        Click the Reset button to go back to the original background color.
      				</p>
				      <p>
					        The image will be blended with the chosen page background color.
				      </p>
				
				      <h3>Blend Modes</h3>
      				<p>
					        You can select blend modes for the image from the select box.  The default is <strong>Normal</strong>, which doesn't apply any blend mode.
				       </p>
				      <p>
					        Once you select a blend mode, the image blends with the page background color according to the selected blend mode.
				      </p>
				
				      <h3>Isolation</h3>
				      <p>
					        By checking the <strong>Isolate</strong> box, the image will cease blending with the page background color.  It now constitutes a separate <strong>stacking context</strong> with respect to the background.
				      </p>
			    </div>
		  </section>
		
		  <div class="colors">
			    <ul>
				      <li>
        <button type="button" value="yellow">Yellow
        </button>
      </li>
				      <li>
        <button type="button" value="red">Red
        </button>
      </li>
				      <li>
        <button type="button" value="blue">Blue
        </button>
      </li>
				      <li>
        <button type="button" value="green">Green
        </button>
      </li>
				      <li>
        <button type="button" value="gainsboro">Reset
        </button>
      </li>
			    </ul>
		  </div><!--/.colors -->
		
		  <div class="controls">
			    <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="color-burn">Color Burn</option>
				    <option value="hard-light">Hard Light</option>
				    <option value="soft-light">Soft Light</option>
				    <option value="difference">Difference</option>
				    <option value="exclusion">Exclusion</option>
				    <option value="hue">Hue</option>
				    <option value="saturation">Saturation</option>
				    <option value="color">Color</option>
				    <option value="luminosity">Luminosity</option>
			    </select>
		
			    <label for="isolate">
      				<input type="checkbox" id="isolate" value=""> Isolate
			    </label>
		  </div><!--/.controls -->
	
		  <div class="box">
			    <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/234228/source.jpg" alt="">
			    <h2>Cityscape</h2>
		  </div><!--/.box -->
		
	</div><!--/.wrapper -->
              
            
!

CSS

              
                @import url(https://fonts.googleapis.com/css?family=Source+Sans+Pro:400,300,900);
* {
	box-sizing: border-box;
}

body {
	background-color: gainsboro;
	color: #666;
	font-size: 1.5em;
	font-family: 'Source Sans Pro', Arial, sans-serif;
	font-weight: 300;
}

.wrapper {
	max-width: 960px;
	margin: 0 auto;
	padding-bottom: 4em;
}

.how-to {
	background-color: #fff;
	border: 1px solid #ccc;
	cursor: pointer;
	font-size: .6em;
	max-width: 300px;
	padding: 0 1em;
	margin: 0 auto;
	overflow-y: hidden;
	z-index: 3;
	transition: background 1s linear;
}

.how-to h2,
.how-to h3 {
	text-align: center;
	font-weight: 400;
}

.how-to h2 {
	margin-bottom: -.5em;
	margin-top: .3em;
	font-weight: 900;
}

.how-to:hover {
	background-color: #d2d7d3;
	border-color: #95a5a6;
}

.how-to h2 span {
	display: block;
	font-weight: 400;
}

.info {
	height: 0;
	opacity: 0;
	transition: height 1s ease-in, opacity 1s ease-in;
}

.how-to.open {
	overflow-y: auto;
}

.how-to.open:hover {
	background-color: #fff;
}

.how-to.open .info {
	opacity: 1;
	height: 200px;
}

.colors {
   margin-top: 1.3em;
}

.colors > ul {
	list-style-type: none;
	text-align: center;
	padding-left: .6em;
}

.colors li {
	display: inline-block;
	margin-right: .5em;
	margin-bottom: .5em;
}

button {
	border-radius: 50%;
	color: #555;
  font-size: .5em;
	font-weight: 700;
	cursor: pointer;
	padding: 1em;
	text-transform: uppercase;
	width: 6em;
	height: 6em;
}

button:focus,
button:hover {
	outline: none;
  border: 2px solid #333;
}

li:first-child button {
	background-color: yellow;
}

li:nth-child(2) button {
	background-color: red;
}

li:nth-child(3) button {
	background-color: royalBlue;
}

li:nth-child(4) button {
	background-color: lightGreen;
}

.box {
	text-align: center;
	margin: 1em auto;
	padding: 0;
	width: 100%;
	max-width: 600px;
	position: relative;
}

.box img {
	max-width: 100%;
	height: auto;
}

.box h2 {
	position: absolute;
	bottom: 1em;
	right: 3%;
	color: white;
	text-align: center;
	font-size: 1.5em;
	font-weight: 900;
	max-width: 60%;
	margin-top: 5em;
	background-color: red;
	padding: .5em .25em;
	transform: rotate(-20deg);
	mix-blend-mode: difference;
}

.controls {
	max-width: 800px;
	margin: 0 auto;
  padding-bottom: 1em;
	text-align: center;
}

select {
	color: #555;
	font-size: 1em;
	height: 1.5em;
	padding: 0 .3em;
	width: 50%;
}

label {
	display: inline-block;
	font-size: 1.1em;
}
              
            
!

JS

              
                (function( $ ) {
	//Toggle help box at the top 
	var $helpBox = $('.how-to');
	$helpBox.on('click', function() {
		var $this = $(this);
		$this.toggleClass('open');
    
    //scroll to the top of the help box when closing it 
		if(!$this.hasClass('open')) {
			$this.animate({
				scrollTop: 0 
			}, 1000);
		}
	});
	
	//Change body background color 
	var $buttons = $('button');
	
	$buttons.on('click', function() {
		var $this = $(this),
			$btnVal = $this.val();
		$('body').css('background-color', $btnVal);
	});
	
	//Add mix-blend-mode to the image using the select box 
	var $select = $('select'),
		$selectVal = $select.val(),
		$img = $('img');
	
	//... on page load 
	$img.css('mix-blend-mode', $selectVal); 
	
	//... and as user makes selection from select box 
	$select.on('change', function() {
		var $this = $(this);
		$selectVal = $this.val();
		$img.css('mix-blend-mode', $selectVal);
	});
	
	//Toggle the isolation property on the image container via the checkbox 
	var $checkIsolate = $('#isolate'),
		$imgContainer = $('.box');
	
	$checkIsolate.on('change', function() {
		var $this = $(this);
		if($this.is(':checked') ) {
			$imgContainer.css('isolation', 'isolate');
		} else {
			$imgContainer.css('isolation', 'auto');
		}
	});
})(jQuery);
              
            
!
999px

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