̒ TURNED COMMA ABOVE UTF-8 character with hex code 0312

Using HEX code of TURNED COMMA ABOVE in HTML file

<span> &#x0312; </span>

Using Decimal code of TURNED COMMA ABOVE in HTML file

<span> &#786; </span>

Using HEX code of TURNED COMMA ABOVE in CSS file for content

span { 
    content: '\0312';
}