They are budget moto-x bars that I bought from biltema.com - I'm not sure what the equivalent english shop is, but that kind of thing should be fairly easy to get one's hands on.
They are for 22.2 mm clamps, so you have to find a bmx-style stem og shim it.
Kinda dark blue / purple. Wide bars with rise are ideal as I take my daughter on a top tube mounted seat.
What are the bars and where from?