I think it's dumb that legendary gear/weapons and raid gear/weapons are the exact same color. It's as good as some exotics, better than most legendary equipment yet, it's still titled legendary? Unless you are an informed player or a seasoned vet, you would have no idea as to how raid armour could benefit you. I could only imagine how many people discarded, or are still throwing away gear, because they have no idea how beneficial raid stuff is.
I think that all raid equipment should be colored differently. Would be even cooler if each raid had different colors. Maybe even consider coloring raid armour a dark color (dark red) and raid weapons a lighter color (light red) for that same raid.
The should address this along with the many bugs, glitches, and exploits that exist in either raid.
If you're actually in the raid.. you know the difference between 'raid' legendary gear and vendor bought legendary gear. I highly doubt anyone has discarded something they got in a raid because it just happened to have a purple background. Leave it the way it is.