TfL Roundel for the Circle Line. Uses official colours from <sup id="cite_ref-1" class="reference"><a href="#cite_note-1">[1]</a></sup>
<a href="//commons.wikimedia.org/wiki/User:Matthewedwards" title="User:Matthewedwards">Matthewedwards</a>
2009-06-20
<span class="int-own-work" lang="en">Own work</span>