I have always been interested in the "Spectrumized" dubbing by Al and Bob, and have all their books, dubbing selections, hand guides, etc. They are sort of hero-like to me, and the Comparadun is a very killing fly on the Delaware system, probably the most used and popular dry fly on those waters since the 80's.
While the Color Guide book is interesting, I would highly recommend purchasing the pre blended dubbing from the DRC rather than trying to replicate the blends from the primary colors. The "pinch method" is pretty crude, and if you had 5 guys try it, I almost guarantee you would have 5 different colors when they were done.
I do agree with size and construction being of more importance than color, but when fishing over those finicky Delaware trout...you need all 3 components to be successful! Good post Byron. CJ