I'm mostly interested in the chit chat and learning something new as I find it all fascinating

But yes, in the end probably 99% of people who see your model outside forums like this won't be able to tell the differences either.

And to be honest, there are so many variables to color anyway that getting that exact match to a fresh off the line painted color is not always the best way to go. Once you factor in how colors change with scale, weathering/fading where the paint was made, how the lighting effects the picture of your model, how the lighting effects the subject you are copying. the white balance of the camera, the white balance of your monitor,  etc... in the ballpark is good enough