Edit in JSFiddle

$('.red-button').click(function(){
    $('.info-box').css({
        'background-color': '#FF8F87',
        'color': '#FFFFFF',
        'padding': '40px'
    });
});
$('.blue-button').click(function(){    
    $('.info-box').css({
        'background-color': '#6EB6FF',
        'color': '#000000',
        'padding': '20px'
    });
});

<p class="info-box">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Soluta iure officia explicabo corrupti iste suscipit laboriosam ipsam sapiente obcaecati maxime! Quisquam recusandae nemo sequi est veniam unde odit dicta dolorum.</p>
<button class="red-button">Red</button>
<button class="blue-button">Blue</button>

.info-box {
    background-color: #efefef; /* Light Gray */
    padding: 10px;
}