JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" name="cb" id="cb" />
<p id="pr">ПРИВЕТ</p>

JavaScript

$('#cb').change(function () {
    if ($(this).attr("checked")) {
        
               $("#pr").css({"color":"blue"});
        return;
    }
   
    $("#pr").css({"color":"red"});
    
});