Here's a mockup with different greens. Personally, I love the dark, dark green background, since it seem to make the flowers more vibrant.
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I would not change a thing. these are so pretty.

I think they are beautiful. Remember, Civil War fabrics never were bright, these are gorgeous. Leave them like they are.

I think the quilt will be beautiful. Keep going and when you are finished please post pictures!!

I am a big fan of Civil War fabric. I recently took a king size quilt to my LQS to be LA and the gal tried politely to explain how she would LA it. She was trying to describe my fabric and she called it "muddy" and I told her it was Civil War fabric and then she got it. I have to order Civil War fabric online because I can't get it any place around me (2 hours drive even). Some people love it and some people just don't get it, I guess. But it's my all time favorite fabric. I hoard CW fabric!!

I think your hexagons are lovely, they have a lovely old-fashioned look.

The blocks have a warm, comforting look.

I love these, and I love civil war fabrics, they always seem homey to me, I guess they are a comfort fabric. Can't wait to see more.

I have been collecting them for a couple of years now from LQS. I always check the sale room and when I find a Civil War I like I buy the yard bundle at a nice reduced cost. When I cut these fabrics I also cut a 2.5" strip to make some jelly rolls for another project someday!

I have been very spoiled - a LQS just 15 minutes from my house stocks lots of CW fabric. But, sadly they are closing in August unless someone purchases the store. There is another shop about 1/2 hour from me, but with a smaller collection.