A yellow ?
<a href="//commons.wikimedia.org/wiki/User:Penubag" title="User:Penubag">penubag</a>
self-made based off of <a href="//commons.wikimedia.org/wiki/File:Ambox_emblem_question_yellow.svg" class="mw-redirect" title="File:Ambox emblem question yellow.svg">Image:Ambox emblem question yellow.svg</a>