JSFiddle - React, Tailwind, and code Playground

by harsh dand

HTML

<div class="page blurme"></div>
<div id="container">
    <p>blur background image with and opaque container</p>
</div>

CSS

.page {
    position: relative;
    padding: 50px;
    height: 500px;
    background: #222 url('http://www.hdwallpapersn.com/wp-content/uploads/2015/04/nature-background-images2.jpg') no-repeat left top;
    background-size: cover;
}
.blurme {
    -webkit-filter: blur(5px);
    -moz-filter: blur(5px);
    -o-filter: blur(5px);
    -ms-filter: blur(5px);
    filter: blur(5px);
}

#container {
    position: absolute;
    top: 50px;
    left: 50px;
    width: 500px;
    min-height: 500px;
    margin: 0 auto;
    border: 5px solid red;
    background-color: rgba(0, 0, 0, 0.7);
}
#container > p {
    color: white;
}