≕ EQUALS COLON UTF-8 character with hex code 2255

Using HEX code of EQUALS COLON in HTML file

<span> &#x2255; </span>

Using Decimal code of EQUALS COLON in HTML file

<span> &#8789; </span>

Using HEX code of EQUALS COLON in CSS file for content

span { 
    content: '\2255';
}