▲ BLACK UP-POINTING TRIANGLE UTF-8 character with hex code 25B2

Using HEX code of BLACK UP-POINTING TRIANGLE in HTML file

<span> &#x25B2; </span>

Using Decimal code of BLACK UP-POINTING TRIANGLE in HTML file

<span> &#9650; </span>

Using HEX code of BLACK UP-POINTING TRIANGLE in CSS file for content

span { 
    content: '\25b2';
}