Forms - Radio buttons - Different title colour when checked

Hi,
I have been trying, without success, to change the colour of my YES radio buttons when checked to show a white label to match my template.

At the moment I seem to only be able to have all black default labels or all white labels.

I have tried these things:

.ba-form-field-item .ba-form-checkbox-wrapper .ba-checkbox-title, .ba-form-radio input[type="radio"]:checked + span:before {
color: #ffffff !important;
z-index: 1 !important;
}


.ba-form-field-item .ba-form-checkbox-wrapper .ba-checkbox-title .ba-form-radio input[type="radio"]:checked + label {
color: #ffffff !important;
z-index: 1 !important;
}

Can you please tell me what I am doing wrong?

Thank you.

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