A Blue Set refers to Blue Legs,
Blue Robe,
a Vampire Shield,
Glacier Mask, Mystic Turban, Magician Hat, or Batwing Hat)
Soft Boots (or Glacier Shoes),
a Stealth Ring (or Energy Ring),
a Blue Backpack (or Moon Backpack)
an Elven Amulet (or Platinum Amulet)
and a Hailstorm Rod, Wand of Vortex or Northwind Rod