All items in Star Wars: The Old Republic have a quality rating associated with them which is defined by the item's text and icon border color.
The item quality guide you to the item's worth. But one should also inspect the item's level as higher level item with an lower quality might be better than a lower level one.
There are currently the following item qualities:
Cheap Quality (Grey)
Standard Quality (White)
Premium Quality (Green)
Not so common drop from mobs, items of this quality are also found as mission rewards.
Prototype Quality (Blue)
Custom Quality (Orange)
All items of this quality are fully customizable, meaning their stats are almost exclusively dependent on the mods placed within. Items of this quality can be crafted, mostly through schematics, or obtained as mission rewards or drops.
- As a side note, items that you personally like the appearance of in this quality category can be held on to and upgraded with end-game mods to customize your character's appearance to your personal tastes.
Artifact Quality (Purple)
These are high quality items. They can be found on corpses of Flashpoint Operation bosses, as rare mission rewards or being crafted.
Legendary Quality (Deep Purple)
Legacy Quality (Light Yellow)
Items of this quality are supposed to be part of the Legacy System of the game.
Mission Quality (Yellow)
Items of this color are used for Mission. They are either used or just collected to fulfil mission objectives.