<div class="radikalwp-fm-colors"><label><input type="radio" name="radikalwp-c" checked /><i style="background:#0f172a"><//i><//label><label><input type="radio" name="radikalwp-c" /><i style="background:#ef4444"><//i><//label><label><input type="radio" name="radikalwp-c" /><i style="background:#3b82f6"><//i><//label><label><input type="radio" name="radikalwp-c" /><i style="background:#10b981"><//i><//label><//div>

.radikalwp-fm-colors { display: flex; gap: 10px; }
.radikalwp-fm-colors input { display: none; }
.radikalwp-fm-colors i {
  display: block;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  cursor: pointer;
  outline: 3px solid transparent;
  outline-offset: 3px;
  transition: outline-color .2s ease, transform .2s ease;
}
.radikalwp-fm-colors input:checked + i { outline-color: #0f172a; transform: scale(1.1); }
.radikalwp-fm-colors i:hover { transform: scale(1.1); }