FALLING DIAGONAL IN WHITE CIRCLE IN BLACK SQUAREUTF-8 Character/Symbol

Using HEX code of FALLING DIAGONAL IN WHITE CIRCLE IN BLACK SQUARE in HTML file

<span> &#x26DE; </span>

Using Decimal code of FALLING DIAGONAL IN WHITE CIRCLE IN BLACK SQUARE in HTML file

<span> &#9950; </span>

Using HEX code of FALLING DIAGONAL IN WHITE CIRCLE IN BLACK SQUARE in CSS file for content

span { 
    content: '\26de';
}