I think I've got the color scheme down though. When I stood in front of my design wall yesterday and turned to my left, I saw this.
My friend the Selvage Fairy mentioned the other day that a lot of the black and whites were kinda dark. Well, when I add the black and whites to the triangle slabs, I generally do it randomly. But I'll save about a third of the blocks until I lay them out on the design wall, and then add the black and white side triangle fabrics depending on what the quilt needs, to avoid areas of too much black.
I did buy a few more black and whites, as you can see in the photo above. I tried to get BWs with not a lot of black in them, but they are surprisingly hard to find.
My studio doesn't have great light for photographing quilts. At night there isn't enough light in that corner, so colors show up as too dark and during the day, the room is filled with light because it faces south, and the lights are blown out and there's a shadow across the top of the design wall. In real life the colors in the quilt are not as dark as they look here.
I've said it several times in this post: "I'm not quite there yet." I'm not 100% convinced this is what I want. But I'm willing to keep pushing, and I'm willing to keep trying and experimenting until I get something that really sings for me. And if I have to rip it out and start over, then I'll do it.