I arrived at the colors associated with each trigram from the book, I Ching, The Classic Chinese Oracle of Change translated by Rudolf Ritsema and Stephen Karcher, published by Barnes & Noble in 1995.

I arrived at the colors associated with each trigram from the book, I Ching, The Classic Chinese Oracle of Change translated by Rudolf Ritsema and Stephen Karcher, published by Barnes & Noble in 1995. However when I did research for this book I noticed that some other I Ching authors didn't associate the same colors with some of the trigrams. I found black, yellow and blood red attributed to The Receptive Earth; Thunder was both green and yellow; Wind/Wood were both scarlet and white, and Abysmal Water both black and blood red. For the sake of time and effort I will continue to use the colors from my original source.

I Ching Prescriptions on Amazon