I've tried to restrain myself from commenting but
I'm seeing others do so, so I will.
1 - I did not want to myself point out that Emerald and Paris are the same Green, but knew someone would. I present:
http://en.wikipedia.org/wiki/Paris_Greenhttp://en.wikipedia.org/wiki/Emerald_(color)#EmeraldBoth being listed as the easiest-to-find colour being "#50C878" Thus it is reasonable to presume that Libertas and other agents of POP could rationally presume that "#50C878" is the colour of Emerald.
2 - Wikipedia has a policy against edit wars
http://en.wikipedia.org/wiki/Wikipedia:Edit_warring#The_three-revert_ruleWhich clearly shows both users are in the "wrong" in this case by constantly reverting one another's work without so much as a peep from anyone else.
3 - I myself noticed this while creating election pages. Is there a duty to report this? If so I am guilty.
4 - I also present that
a party has no business and no right to chose it's own colour. As evidence I present this:
http://www.democrats.org/ this:
http://www.gop.com/index.php/ and this:
https://uselectionatlas.org/ that clearly shows that parties do not get the chose their own colours, and since we do not have said right enshrined in law, we should rely on this precedent.