Judging from the intro photos, Bonnie seems to interpret the color cards with quite a bit of leeway with respect to value and intensity when picking her fabrics. The hue seems to be the thing that she keeps constant (i.e., blues with a certain amount of green in them, greens that aren't too blue). Since I want a scrappy look for my quilt, I'm pulling some pretty questionable blue and pink multi prints from my stash. I guess whether they work or not will depend on how we're going to cut them. Once we get started, I hope I'll be able to tell what's working and what's not! I don't quite get how I'll know without having a picture of the whole quilt to work from.
I wonder what the illusion is, in 'Grand Illusion'?