Flag of Harad from J. R. R. Tolkien's Middle-earth writings, with (wrong) inverted colours. The snake itself should be not red but black and the background should be not black but red.
<a href="//commons.wikimedia.org/wiki/User:Mandos" title="User:Mandos">Mandos</a>
2 January 2008 (upload date)
<span class="int-own-work" lang="en">Own work</span>