8-PWell, would RGB colours really do the trick? Relative to what, and within which colour space?
Given controlled lighting, wouldn't an absolute colour space like L-a-b be better than any of the common RGB colour spaces (sRGB, Adobe RGB, ProPhoto RGB and similar)? Or, perhaps, we should go with comparisons of views of printed Pantone(TM) colours that can be approximated via CMYK printing or its variants, under varied colour temperatures and lighting conditions (direct, indirect, at various angles left, right, above, below...)? And that's just a brief summary of where things can go if you want them to...
Personally (and many thoughts may vary here) I'm @ Birdforum and the binocular bits to avoid these kinds of discussions - which happen all too often on photography forums - but more power to your left elbow if you wish to persist. My guess: this kind of thing never ends, so certainly can't end well...
...Mike
Didn't really wan't to get started on this one. I knew I was drowning.
David