I bought the mudflaps and went out to put them on... Held them up in place, thought they looked ****e and re-packed them in their package before putting them in the cupboard under the stairs...
Strangely, I've just been out driving and saw a Dry Turquoise Panda with mudflaps. They looked no better than the picture you found.
I would forget them.
The 4x4 comes as standard with what I would call spats rather than mudflaps and they look OK. You can get 4x4 mudflaps but they would just get in the way off-road and look not so good anyhow.
They don't look too bad on silver. I don't think they'll sit well on a orange Panda though. Also I think it would look better if you had a pair on the front. They do look a little long, but I bet your boot doesn't get caked in dirt