d LATIN SMALL LETTER D UTF-8 character with hex code 0064

Using HEX code of LATIN SMALL LETTER D in HTML file

<span> &#x0064; </span>

Using Decimal code of LATIN SMALL LETTER D in HTML file

<span> &#100; </span>

Using HEX code of LATIN SMALL LETTER D in CSS file for content

span { 
    content: '\0064';
}