When color-blocking you’ll also want to try to get two fabrics relatively close together in both weight and fiber content, that way both halves of the coat will act similarly. The pink fabric I photographed in the pile above comes from Mood which has a few different color-ways of the same fabric. Something like this would be perfect for a color-blocking situation. If you can’t find two fabrics that are similar in weight, you can easily interface the thinner fabric to approximate the weight of the thicker one. We’ve got a great post here on determining yardage which will likely come in handy for plaids & nap, but will also be useful if you decide to color-block! Our yardage requirements don’t include this as there are many different ways each individual may decide to place colors. Keep in mind that you’ll want to cut piece 9 (the front facing) out of the upper fabric since that folds to the outside of the coat to form the lapel.
That’s a lot of info, but I hope you find it helpful in guiding your fabric selection process! Please note that, outside of the blush wool from Mood, I have not seen the swatches pictured and linked here in person and therefor highly recommend grabbing a swatch of any you’re interested in. Based on the descriptions they seem like they’d work, but you know what we talked about above!
We also have two previous coating posts relating to the Cascade Duffle Coat that you might find helpful in your search for fabric; you can find these two linked below: