A cornflower blue check.
<a href="//commons.wikimedia.org/wiki/User:Rocket000" title="User:Rocket000">Rocket000</a>
Derived from <a href="//commons.wikimedia.org/wiki/File:Yes_check.svg" title="File:Yes check.svg">Image:Yes check.svg</a> by <a href="//commons.wikimedia.org/wiki/User:Gmaxwell" title="User:Gmaxwell">Gmaxwell</a> and <a href="//commons.wikimedia.org/wiki/User:WarX" title="User:WarX">WarX</a>.