<input type="radio" name="x" aria-label="One" checked>
<input type="radio" name="x" aria-label="Two">
<input type="radio" name="x" aria-label="Three">

input {
  appearance: none;
  padding: 5px;
  background: #ddd;
}
input::before {
  content: attr(aria-label);
}
input:checked {
  background: #09e;
  color: #fff;
}