ä LATIN SMALL LETTER A WITH DIAERESIS UTF-8 character with hex code 00E4

Using HEX code of LATIN SMALL LETTER A WITH DIAERESIS in HTML file

<span> &#x00E4; </span>

Using Decimal code of LATIN SMALL LETTER A WITH DIAERESIS in HTML file

<span> &#228; </span>

Using HEX code of LATIN SMALL LETTER A WITH DIAERESIS in CSS file for content

span { 
    content: '\00e4';
}