JSFiddle - React, Tailwind, and code Playground
HTML
<input type="radio" name="radio" id="radio-1" checked />
<label for="radio-1">Подпись-1</label>
<input type="radio" name="radio" id="radio-2" />
<label for="radio-2">Подпись-2</label>
CSS
input:not(:checked)+label{
color: red;
}