JSFiddle - React, Tailwind, and code Playground
HTML
<form>
<span id="betalfakturavalg">
<input type="radio" name="betalfakturavalg" title="Valg Faktura"
onclick="document.getElementById('betalfakturavalg').style.cssText='border-color:#85c222; background-color:#E5F7C7;';" /> Faktura - For bedrifter
</span>
<br>
<span id="betalkortvalg">
<input type="radio" name="kreditkort" title="Valg Kreditkort"
onclick="document.getElementById('betalkortvalg').style.cssText='border-color:#85c222; background-color:#E5F7C7;';" /> Kreditkort - For alle privatpersoner
</span>
</form>