̰ TILDE BELOW UTF-8 character with hex code 0330

Using HEX code of TILDE BELOW in HTML file

<span> &#x0330; </span>

Using Decimal code of TILDE BELOW in HTML file

<span> &#816; </span>

Using HEX code of TILDE BELOW in CSS file for content

span { 
    content: '\0330';
}