⛋ WHITE DIAMOND IN SQUARE UTF-8 character with hex code 26CB

Using HEX code of WHITE DIAMOND IN SQUARE in HTML file

<span> &#x26CB; </span>

Using Decimal code of WHITE DIAMOND IN SQUARE in HTML file

<span> &#9931; </span>

Using HEX code of WHITE DIAMOND IN SQUARE in CSS file for content

span { 
    content: '\26cb';
}