JSFiddle - React, Tailwind, and code Playground

HTML

<body background="http://ib1.keep4u.ru/b/070815/ef2714da63d5940bf5.jpg">
    <div>test</div>
    <div>test</div>
    <div>test</div>
    <div>test</div>
    <div>test</div>
    <div>test</div>
    <div>test</div>
</body>

CSS

body{
    opacity: 0.1,
    filter:alpha(opacity=10)
}