I have used the "creative color system" but they don't have a wide range of colors. Thanks for the update on the caddis pattern!
I was just in the mood to try different colors. I tied the crayfish in black, brown, and olive. Never know what might work. I have a friend that ties them in bright orange. Never seen that color unless they are being cooked but it works for him. I got a couple from him and am anxious to try them out.
One variation I tied for this pattern is also to move the dumbell eyes to just below the hook point. I am anxious to try them. They drop more flat/level instead of droping tail first. If you ever watch the real ones they can drop level but have their claws up.