It means you haven't conformed to what they expect of you. It will turn darker purple or black if you fall in line, pink or white if you lean the other direction. At least, that's what we've been able to uncover.

[He was working to get his own submissive's mark onto the darker scale, but he doesn't tell Vanessa this, yet. There's only so much she can probably tolerate hearing right now.]

You should take care to hide it if you do go out. They've begun to take those who resist their system and place them in their facilities for 'reprogramming'. [And he would hate to see her carted off for that. Dorian would, at least, fight to prevent that if he could.]

And I know; it's rather jarring from the mindset of most societies. But they are serious in their research and their monitoring of us, especially. I will help you adjust to it in any way that I can. And, of course, bring Mr. Chandler up to date with the same information.