Nils,
Did the craftsman who painted that CB400F tank use an exact match to the oem Honda Varnish Blue ? Colorite,etc. ?
The formula posted elsewhere on this site references a European DuPont formulation that wasn't much use, but it also referenced a Toyota paint code 8A1 I think (don't trust that - from memory) that WAS. I carried that paint code into my local paint shop and they had no trouble making it.
Is it a ringer? I don't know. It looks fantastic, correct to my eye, but I would not say I'm sure.