Already Reblogged symbol green or purple?

[amaradangeli]

I've recently noticed both green and purple highlighting on the reblog symbol. I'm taking both to mean the same thing: that I've reblogged the post. But is there some other meaning?

[AprilSylph]

• Green = Reblogged
• Purple = Queued
• Red = Drafted

[AprilSylph]

The "remember which posts I've already reblogged" option does not differentiate, though, as it would be much more work to actually track if the post is still in your queue/drafts.