The wheels on the bus

I recently stumbled across this gorgeous singlet by Little Rose on http://www.madeit.com.au/ (yes yes, I spend FAR too much time browsing on there). I wasn't looking for anything like it, but I just had to snap it up (you understand don't you?) as soon as I saw it.

It's hard to do it justice with a photo - the retro bus is felt (feels so lovely when I stroke it!) and the little cap sleeves are just divine. I confess I am a total sucker for fabric sleeves on a knit top of any description. I think I picked up that trait from my Mummy.

I'm going to team it with some denim shorts to wear tomorrow. I'm just not sure whether to go with dark denim or my faded chambray ones. Suggestions?