Hi Darrell & All,
You might find this short article of interest:
http://www.astronomycafe.net/qadir/q72.html
In a nut-shell, to quote: "colour does not exist as an 'objective property' of nature" -- there are no actual green stars. Our eye's perception of colour is a result of its differing sensitivity to different wavelengths across the visible spectrum.
Really, there is only Blue, White, Yellow, Orange and Red stars -- as we see them with our eyes that are only sensitive to certain colours.
Having said that, I've seen a lot of interesting colours in pairs (double stars) such as lilac, green, aquamarine and even pink (what'll they think of next a pink star!)
These colours are not "real" in the sense that it is a property of that star, they are contrast effects because of the colouration of the other star.
Hope this helps,
Best,
Les D