I debated about fabric for quite a while before settling on an interesting purple fabric from Colour Cascade Fabrics. This was part of a special sale on her Facebook page a couple years ago and she posts a lot of inside info there, so I'd recommend following her. She's carrying her own hand-dyed threads as well.
I'll have to work on getting a better photo of the fabric. This shows it as more blue than it really is. It's a definite light mottled purple and I'm using WDW Michael's Navy which is darker than is shown in this photo. I'm stitching 2 over 1 on 18 count Aida.
There's not a lot of horizontal clearance on this fabric, so I'm debating about squeezing the elements together a little to create a little more room. I'm not too worried since like Chromatic Alchemy, CCF also serges the edges of their fabric, so there's no worry about anything unraveling.
I'm happy with it so far, and it's been an easy stitch too.