Button radios widget background and font color

Want to change the background and text color for the SELECTED radio button. I have it working for my Button Checkboxes control, but can't figure out the CSS for this control.

For theButton Checkboxes widget, it was:

.checkboxes input.checkedButtonCheckbox + label {
color: white;
background: black;
}

for this it would be .radios input.xxxxxxxx

But I can't figure out the rest. Thanks in advance.

This is a duplicate thread. I already posted my reply on the other thread, here's the URL: https://www.jotform.com/answers/883686

Thank you.