Q:

What are the item rarity colors in Xenoblade Chronicles 2? 

I’ve noticed that items I get from salvaging in Xenoblade Chronicles 2 come in a few different colors. ( White, orange, purple).  I assume these represent item rarity, but I’m not sure what each color means. 
What are the item rarity colors in Xenoblade Chronicles 2? 

A:

The item rarity colours, when on the ground, is as follows. 

White = Common
Purple = Uncommon
Orange = Rare

Likewise chests have a visual rarity to them, most notably when salvaging since chest in the field are not random. 

Brown chest = Common
Red chest = Uncommon
White chest = Rare

