◮ UP-POINTING TRIANGLE WITH RIGHT HALF BLACK UTF-8 character with hex code 25EE

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

<span> &#x25EE; </span>

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

<span> &#9710; </span>

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

span { 
    content: '\25ee';
}