The Darkness personified is distinctly purple.  Contrast Sam’s POV inside the Darkness versus Dean’s in the opening scenes of Out of the Darkness, Into the Fire.

Supernatural makes vigorous use of visual imagery, including thematic use of color.  Purple didn’t show up often in the early seasons, but it’s use has become more and more marked.

Here we have the infamous purple nurples in Tall Tales.  If ever there was an episode about the power of point of view, this one was it.  Was Starla “just trying to keep her liquor down?”  Or was she a “class act?”  I supposed it depends on who’s telling the story.

In Season 9′s Bad Boys, “the story became the story.”  First love’s kiss or just another “bad boy?”  “Delinquent” or a young boy desperate to feed his little brother?  What was the story?  Dean was away on a hunt?

And then we have Season 10′s Fan Fiction, in which “I have my story and you have yours.”  

Sam takes a very purple point of view looking at his newly returned brother in Paper Moon.  Everything’s all right here, right?  We’re back to normal?  Two brothers kicking back and enjoying the life?  

But sometimes what we see is an illusion.  A figment of magic and willful perception. (Executioner’s Song)

I’ve said before that flowers in Supernatural hint at secrets, at things yet to be revealed.

So, what is being hidden here?  What is yet to be revealed?

The story became the story, a tale told by Death.  The victor gets to tell the tale.  But what story might the vanquished tell if she were given a voice again?