The colors got deleted along with the images because they turned control of the chart over to a person that thinks they know more about guinea colors than they actually know.The DNA sequence mutates during cell division, the color is the result. If the DNA copies the mistake, then it passes it on to offspring. Eventually the "mistake" becomes the standard.
I'll go out on a limb and assume that you aren't bringing in fresh blood to your flock every season, so the bulk of your flock has shared DNA. Likewise, you always say "if I breed this to this,I get this" - so if you control the mating, you have some control of the genetics to produce what you want.
Is that why they deleted the bulk of the colors from the association's color chart? Such a disservice.