There isn't a vintage honda paint code like modern paint codes. There is no formula in their numbers.
You should be able to get close, or find repro decal kits. If your trying to touch up, that might be hit or miss..You didn't say what your trying to do.
A gold color on the tank is a candy that takes, usually, a base coat color, usually a middle silver color, then a final "candytone" gold translucent color to get the end result. The stripe? no way to know how honda did that...
here's a picture of the honda top coat paint used on my '75 honda....R-2C will not give you a formula ...just the name of the color...which is candytone orange...