The RB 75 you are referring to was more like a camo green with a yellow band though, if it was inert it would be painted in a green that was a lot more vivid. Just like on the AT4 (pansarskott), they are kind of a dark camo green with only a coloured ring to differentiate between the live (yellow band) and the training weapons (Blue band). It would surprise me if it were any different on the Viggen. :-)