<label class="select error" for="select-error">
  <select id="select-error">
    ...
  </select>
</label>

<label class="select warning" for="select-warning">
  <select id="select-warning">
    ...
  </select>
</label>

<label class="select success" for="select-success">
  <select id="select-success">
    ...
  </select>
</label>

<label class="select select-s" for="select-s">
  <select id="select-s">
    ...
  </select>
</label>

<label class="select info" for="select-info">
  <select id="select-info">
    ...
  </select>
</label>