css/css-variables/css-vars-custom-property-inheritance.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>CSS Variables Test: custom properties use normal inheritance and cascade rules</title>
    <link rel="author" title="Noah Collins" href="mailto:noahcollins@gmail.com">
    <link rel="help" href="http://www.w3.org/TR/css-variables-1/#using-variables">
    <meta name="assert" content="custom properties are resolved with the normal inheritance and cascade rules">
    <link rel="match" href="reference/css-vars-custom-property-inheritance-ref.html">
    <style type="text/css">

        /* test cascade importance */
        :root { --color: #1c1 !important; }
        :root { --color: red; }

        /* test cascade order */
        * { color: red; }

        /* test cascade order */
        * { color: var(--color); }

    </style>
</head>
<body>
    <p>Green</p>
    <p>Green</p>
    <p>Green</p>
    <p>The test passes if everything is green. Any red means the test failed.</p>
</body>
</html>