I have at long last found a good fabric for the owl wholecloth. It's a lovely warm yellow, lighter than the marigold yellow on the owl fabric so that it won't be overwhelming, but an excellent colour match. You can see it in the photo below sitting on top of the quilt, with random eyebrow designs done to test out threads. I will order it now, but I have to finish quilting the turquoise/green baby quilt first, quilt the Crazy Women quilt, which will be my first foray into using thicker thread (perle #8, with correspondingly bigger stitches), and at the least get started on quilting the seashell quilt. This will give me a chance to mull over threads and binding choices. I could use the stronger yellow/orange batik fabric which I've put in the photo below the owl fabric, or I could pick out an orange or pink from the quilt, or else I could use this fabric from the same range, which might be a bit dark, hard to tell. I'm including a photo of a quilt the manufacturer has put together with lots of fabrics from the same range. The two fabrics in question aren't right next to each other, and it's a small photo, but you can at least see them near each other. Is flannel a practical fabric to use for binding? Alternatively, and having now tested out more of my fabrics near the combination, something like this would make a lovely binding (also shown below).
As for thread, the photo shows a perle #8 in a medium-deep pink on the right, and two strands of 40 wt quilting cotton in a darker fuchsia on the left. The right hand thread is one I could get in a perle #12, whereas the left hand thread isn't, it's just the only thread of any sort I have in that colour, and the nearest equivalent would be this. For the first one, you can get slightly different colours in the same range: the one I have right now is col. 28, and I am finding it hard to tell whether there's one which is basically just a slightly darker verion of the same pink. At the moment, I think the lighter thread looks better of the two samples, but then it has a stronger effect because it's in a thicker thread, and I was thinking of using perle #12 for this one. That said, it shows up so strongly as #8 that it should still show up pretty well as #12, and it would interfere with the owl fabric on the back of the quilt less. I think I will wait and see how the Crazy Women quilt turns out, and by that time I will know whether I want to do an entire wholecloth in perle #8 (I suspect not). It'll also give me a chance to see whether I have visual trouble working with the deeper pink/red threads.