WTF are these colours?

The idea around the use of colour in my post is very simple (and quite unoriginal):
  • Green means lame or inferior (like that DK tank wearing greens in that heroic)
  • Blue refers to things that are average or par for the course
  • Purple is a statement of epic; these things are pretty damn cool
  • Orange grants legendary status
  • Red indicates anger and is the colour of rage.