<!DOCTYPE html> <html> <head> <style> label {color: red} input[checked]:checked:default + label {color: green} input:not(:checked) + label {color: green} </style> </head> <body onload='document.getElementById("two").setAttribute("checked", "true");'> <form> <input type="radio" name="group1" id="one" value="1"/> <label for="one">Should be no red</label><br> <input type="radio" name="group1" id="two" value="2"/> <label for="two">Should be no red</label> </form> </body> </html>