Would it be possible to add a colored border to items in trade window like we have for stash?

I see a lot of people complaining about getting scammed. We have already in game a system where the seller is able to easily identify the item being sold in their stash via a purple border confirming the item on their side.

Why not have the same thing for the buyer where the item you whispered that person for will have a purple border in the trade window?

An elegant solution

It makes sense for the seller if you have let's say a quad tab filled with items. As a buyer you should always be checking to make sure it's correct- a colored border around an item in trade window does nothing