What are the different items rarity colors, and what do they worth at the PNJ's?

The item colors are:

  • white = normal,
  • blue = magic,
  • yellow = rare,
  • orange = unique
  • any of the four colors with border = map with according rarity
  • gold = special (orbs, scrolls)
  • dark green = active skill gems
  • light green = quest items

You can find a list of known vendor recipes here (spoilers!).