You won't find this paint in any catalogue probably because it's a Japanese formulation. I doubt there is a REAL code for Candy Ruby Red or Candy Blue Green either. These colors have been matched over the years by various companies. You will also not find a code for the frame black or the black parts used on a sandcast. Same for the engine silver. Sunny Gold was used on the tank stripe and the side cover emblem only so doubt it will have ever been given a universal code
On another note, I have 2 early side covers with non-barcode labels which I purchased many years ago. When I removed these from their respective boxes I noted an ever so subtle difference between the 2. Same for a NOS fork ears I have.
I think if you match the color close or near perfect nobody will ever pick it if it is ever so slightly out. Even if the bike was lined up against a bone stock original nobody could be so good as to say it wasn't correct.
On another note, has anyone ever noticed the Yamiya repop/repainted K0 tanks. The stripes are: IMHO: way off being close to the original look