Bluemotion is just the VW generic term for a set of efficiency technologies (stop-start, low rolling resistance tyres etc). They first used it in 2006 on one of their cars.
It's nothing to do with Adblue, which is needed on Euro6 engines.
I think all T6's might be Bluemotion (like mine is), but mine too has a Euro5 engine, so no Adblue.
Pete