I think I've finally settled on fabrics. I'm going with different colors for fun - and because I'm not a big fan of purples.
The burgundy/dusty pink will be substitute for the purples. Brown for the greens, Gold for the Yellows. The blue will be the constant. I ended up doing a lot of swapping to get a nice differentiation between the pinks and neutrals.
All of the browns and neutrals have burgundy or dusty pink in them.