<!DOCTYPE html> <html> <head> <title>CSS Variables Test: custom property names are case-sensitive</title> <meta charset="UTF-8"> <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 property names are case-sensitive"> <link rel="match" href="/css/reference/ref-filled-green-100px-square.xht"> <style type="text/css"> :root { --lowercasegreen: green; --MixedCaseGreen: green; --lowercasered: red; --MixedCaseRed: red; } div { width: 100px; height: 25px; } </style> </head> <body> <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> <div style="background-color: var(--lowercasegreen, red);"></div> <div style="background-color: var(--MixedCaseGreen, red);"></div> <div style="background-color: var(--LowerCaseRed, green);"></div> <div style="background-color: var(--mixedcasered, green);"></div> </body> </html>