I like the sagey green best.

Enough contrast to show the silhouettes - but soft like the background.

I like the black best...seems to pop and connects well with the black in the background,

Either the second or third one seem to fit best with the background fabric.

I like the black.....most silhouettes I've seen are done in black.

I would eliminate the green. While it plays nicely with your background if you were piecing, I don't think it is the right choice for an appliqued silouette quilt. If a portion of the silouette lands just right on one of the green circles (which are so tightly spaced it would be impossible not to land on one) it could start playing tricks with your eyes and distort your silouette. I think the black or the gray are your best bets. I would lean towards black just because it will bring the silouette into sharp relief against the patterned background and from a distance will not fade into any of those design elements in the background fabric. Any of your lighter colors would do that and you may lose the impact of the silouette.

I like the green. Very soft and subtle.

I like the green the best

:p Tis things like this that keep me from letting my friends know I am making them something. Nothing like a ton of "help" that just doesnt fit with your vision or budget! I finally told my best friend "You trust me to do something beautiful, trust me to pick the colors that will best accent the design as well" So far she hasnt been disappointed.

Good luck, cause I know it is difficult to work on something you would not naturally select.

I agree that the grey or black would be best :)

After looking at the site provided, I think the fabric will work for the background. There are some beautiful pieces that have very textured backgrounds. If the background needs calmming maybe a border or lattice work in the same color as the sillouettes will work. As far as which color, I think anything that provides a high contrast will work. I don't think I would use a fabric that "matched".