Ⅰ ROMAN NUMERAL ONE UTF-8 character with hex code 2160

Using HEX code of ROMAN NUMERAL ONE in HTML file

<span> &#x2160; </span>

Using Decimal code of ROMAN NUMERAL ONE in HTML file

<span> &#8544; </span>

Using HEX code of ROMAN NUMERAL ONE in CSS file for content

span { 
    content: '\2160';
}