⊞ SQUARED PLUS UTF-8 character with hex code 229E

Using HEX code of SQUARED PLUS in HTML file

<span> &#x229E; </span>

Using Decimal code of SQUARED PLUS in HTML file

<span> &#8862; </span>

Using HEX code of SQUARED PLUS in CSS file for content

span { 
    content: '\229e';
}