its more greyish than blue to be honest dude, doesnt do it at all when you nail the throttle or should i say if i have been driving it like a bird for a bit then nail it some smoke comes out then it clears and its fine, it does it more on over run ie when you back off the throttle from about 3500 -4000 rpm then go back on the throttle it will blast out some smoke which will then clear. if you rev it up when the cars stationary it will pump out smoke again but when it does this it smells badly of fuel.
ive seen engines before when the rings have gone and its nothing like that.
(hope you can understand this m8!)