If you mix the three primary hues from the additive color wheel, the result is:?
I think you should search on the web you will get to know where how to buy it.
I like the copper stocks, actually I like all the metal stocks long term. I have done well with fcx but there are many copper stocks to choose from.
Stay away from commodities as an investment tool!
Additive color would be using light.so in that case the result would be white.