Candy blue-green was a 1969/70 Honda color used on several Honda models including CB450's, the very 1st sandcasts and CB750 K0's. Those original candy blue-green sandcasts actually were a little bit "greener" in color, probably due to the paint mix at the time. They almost look jade and have a opulescent glow about them, its really special an orig paint sandcast. When you bought a later cb750 K0 or a replacement body part years later, it was a bit bluer in hue. Side by side its obvious.
To throw a little curve into all this, candy blue-green over time yellows a bit (as do most colors) adding to its rich patina and aura. An orig paint sandcast w/ all its subtle corrossion of nicks, scratches, dirt, grime etc is totally sexy.