I agree with the rest about the plum.

They play well together.

I like what you have put together. Keep the plum AND the pink! I think you have a really interesting group there.

I agree with those who said purplish with circles doesn't go. love the other fabrics.

I like a little interest in a quilt which I think the pinkish one has. So I would keep it depending on the pattern/quilt. I actually think it is a nice bridge between the two leafy prints (looks from here like they have that color in them as well). The reason it is 'screaming' in this photo is that you have it placed next to the light yellows. So... depends.