"Le livre est joli, alors qu'il est sale."
As someone who doesn't come from a french background nor takes formal classes, I had no idea that alors + que would mean even though (at least I wouldn't guess that from the dictionary hints). And how should I know? This one needs a dictionary hints that takes into account alors and que together. Thank you so much for your explanation though!
Right, I realized that later on, my apologies for sounding like a jerk. I do think it was another case where the two words weren't grouped together with one definition when they appeared the first time (this time), so it seemed like my answer should have been right, when in fact I didn't even notice the "que". Thanks for the response.