Style label when radio is checked, but radio is within label

Question

I'm working to style a form where I can't edit the HTML. I want to change the label text's color if the radio input is checked.

Here is the HTML

<label class="label-name">
    <input name="radio-name" type="radio">
    Yes
    <a></a>
</label>

And here is the CSS I'm using

input[type="radio"]:checked + label {
    background-color: #d9521e !important;
}

However, the label color isn't being updated. Is there any way to do this with CSS or JS?