Unfortunately, eBay and Paypal are no help in this type of situation. I have experienced it too. The only thing is to try negotiating with the seller. Unfortunately, your seller is already unresponsive.
There should be some sort of exception in your case because you were notified of a possible fraud situation (and I would think misrepresenting an item as to colour constitutes fraud). So, it seems unfair you will be out money no matter what happens. However, that seems to be how things work here. You were lied to and end up out of pocket. The seller either gets the item back to resell or gets to keep your money if you don't return it. Either way - they win, you lose. Seems fair, right? 😉
All you can really do is leave appropriately negative feedback and DSR ratings. That is about the only way to impact a bad seller. And be somewhat thankful the money lost is not too much.
Unfortunately, I cannot offer any way to avoid this, other than to check seller feedback (esp the neg and neutral) and make a considered choice as to where you will buy.