I found some blue fabric, so I've got some more photos. I think the blue (either blue) is brighter, and probably goes with the pink fabric better than the green, but somehow I still like the green. I guess either would work, cos green can be grass and blue can be sky. But I'm still sitting on the fence over it.
I almost think the blue is too bright and overpowers the design - if I did use blue it would probably have to be the paler one, even though that isn't my favourite. I think I may be leaning towards the green as it's more background than the blue would be. What do you think?