◩ SQUARE WITH UPPER LEFT DIAGONAL HALF BLACK UTF-8 character with hex code 25E9

Using HEX code of SQUARE WITH UPPER LEFT DIAGONAL HALF BLACK in HTML file

<span> &#x25E9; </span>

Using Decimal code of SQUARE WITH UPPER LEFT DIAGONAL HALF BLACK in HTML file

<span> &#9705; </span>

Using HEX code of SQUARE WITH UPPER LEFT DIAGONAL HALF BLACK in CSS file for content

span { 
    content: '\25e9';
}