The fifth taste...

[falkbeer]

I wonder if part of the reason of why yellow stands out is because of the layout of the color gamut. From what I have read, it seems that no three color system can fully cover all of the hues, but rather a section of the total pallet of colors.

do "primary" colors exist?

Vision and color are at the heart of painting

A bit of a hijack, hope the color commentary is not in poor taste.

The success of reproducing colours depends very much on which medium you are using. I believe that the very best method still is colour slides. Printing is difficult -- some hues will appear muddy. But there is a trick, if you want clean hues you can print with solid colours instead of the normal 4-colour system. The printer will mix a special colour to your specification. The very best reproduction of B/W photography I´ve ever seen was printed with a system called Quadratone -- two hues of grey and two of black. Colour is very interesting. Very often the sourrounding colour will define what you will see. Here is an example: http://antwrp.gsfc.nasa.gov/apod/ap070717.html