prefers-contrast-black-ref.html (226B)
1 <!DOCTYPE html> 2 <meta charset="utf-8"> 3 <title>reference: a black box to test the prefers-contrast media query</title> 4 <style> 5 div { 6 width: 100px; 7 height: 100px; 8 outline: 2px solid black; 9 } 10 </style> 11 <div></div>