Either the rose or the green would be my choice. The purple is a bit dark for the pretty blocks.

my favorite is the green

I like the navy blue.

R O S E.........it pop's !

I didn't read I guess because looked again it wasn't navy blue but purple so I vote purple.

This is a tough one because it all depends on what look you want to achieve.
the rose sets the blocks off beautifully,, decorative stitches on the edge will work
the green works if you are looking for a softer feel.
The blue doesn' t work for me at all, does nothing for the blocks,
the purple would work if you are looking for high contrast

It' s. All a matter of taste & the feel you are tryinng to achieve.

If you use the rose, which looks beautiful, you will lose the tops of your boxes.

green

I vote for the green or rose. If you really prefer the rose, lose the boxes and chalk it up to a learning experience.

ditto
:-)