Item Color Codes

The colors, oh man, the colors, the colors. I see the names of items in "Diablo II: Lord of Destruction" appear in different colors ... what do these item colors mean?

White = Just a regular item
Gray = A socketed or an ethereal item
Blue = A magic item
Orange = A crafted item
Green = An item to a set
Yellow = A rare item
Brown = A unique item
(why do they call it a unique item when you can find more than one? I always thought unique meant there was only one ... oh well, these are still really cool items to find.)

Side Note: Holding down the "Alt" key will display the names of any items on the ground. This is one way to see the item colors we are referring to in this post.