̇ DOT ABOVE UTF-8 character with hex code 0307

Using HEX code of DOT ABOVE in HTML file

<span> &#x0307; </span>

Using Decimal code of DOT ABOVE in HTML file

<span> &#775; </span>

Using HEX code of DOT ABOVE in CSS file for content

span { 
    content: '\0307';
}