The color chart shown above is called a fan deck. They are usually used by interior decorators or painters. The colors will all have a marketing name for the color. However, the color will have a code which can be converted into a Pantone color (or even a CMYK or web color) depending upon the application. Fan decks are good for picking paint colors or fabric colors. They are not as food for picking a color out of a family of colors. Charts and posters are better for that. Probably we will need to have a quick reference chart (portable and useful for quick reference) and a poster. These could be be printed using any printer. In addition we can have a chart with big color patches that you could hold an egg up to and say that is Pantone Ocean Blue or color code XXXXX. Because both the poster and the reference card would be calibrated, you could take a picture of the egg and then use a photo editing software to create a web calibrated photo of a Legbar or the egg. And then (and this is the big if) people had taken the time to calibrate their monitor to Pantone, the image would display the correct color for say the red comb of the Cream Legbar.
You cannot do that with an inaccurate system such as OAC. That's why we would need a calibrated system like Pantone (or the free web color equivalents of Pantone). Then when people say "is the color Cream or Gold?" someone can actually load up the photo in a photo editing program and say "Oh that's Pantone Sunshine Cream" (I don't know if that is actually a color as I just made up the name).
If an APA judge really wanted to judge by exact colors, then they already can by purchasing a portable Pantone scanner. You just hold it up to the color (in this case a feather or egg) and press the button. It will scan and analyze the color and tell you the Pantone color code. The portable devices cost between $200 and go as high as $10,000. It just depends on how accurate you want to be.
Personally I plan on using the chart and poster so that when people ask about a pullet for sale, I can describe the pullet for sale with actual calibrated colors. Then if the buyer does not have the chart (or poster), I can email them it or tell the to go to the hardware store and be able to tell them it's the same as Valspar Summer Sunshine, for example. That's the beauty of a cross-platform calibrated color system. You don't need to all have the same chart. You just can't do that with a system that just threw together colors without any cross-calibrated reference chart.
