⦱ EMPTY SET WITH OVERBAR UTF-8 character with hex code 29B1

Using HEX code of EMPTY SET WITH OVERBAR in HTML file

<span> &#x29B1; </span>

Using Decimal code of EMPTY SET WITH OVERBAR in HTML file

<span> &#10673; </span>

Using HEX code of EMPTY SET WITH OVERBAR in CSS file for content

span { 
    content: '\29b1';
}