Æ LATIN CAPITAL LETTER AE UTF-8 character with hex code 00C6

Using HEX code of LATIN CAPITAL LETTER AE in HTML file

<span> &#x00C6; </span>

Using Decimal code of LATIN CAPITAL LETTER AE in HTML file

<span> &#198; </span>

Using HEX code of LATIN CAPITAL LETTER AE in CSS file for content

span { 
    content: '\00c6';
}