In war taking the opponents colors means you are insulting and dominating them.  When the clinton's came out after the 2016 campaign lost they were both wearing royal purple a color associated with the deep state.  And so then, the Loyal few in the US started wearing purple as an insult to them.  So if some one is loyal to the DS they might wear purple to send a signal that they are still Loyal.  If someone is out to overcome the DS they would wear it to send a message that they are taking control over them.  It be like wearing your rival schools mascot on your letter jacket.